Question: Were Erle Stanley Gardner and Paula Fox both authors?

Context articles: The Case of the Howling Dog
Gold Seal Novel
Erle Stanley Gardner
Paula Fox
The New Perry Mason
Perry Mason (radio)
List of Perry Mason episodes
Erle Stanley Gardner bibliography
Perry Mason (TV series)
Special Investigator (film)

The Case of the Howling Dog is a 1934 American mystery film directed by Alan Crosland, based on the novel of the same name by Erle Stanley Gardner.
 The film stars Warren William and Mary Astor.
 This was the first in a series of four films in which William played Perry Mason.
Gold Seal Novels are illustrated novels covering a wide range of genres published in editions of the Sunday "Philadelphia Inquirer" between 1934 and 1949.
 They were published as a "complete illustrated novel" as a section of the newspaper's Sunday edition.
 Authors include John Dickson Carr, Clyde Brion Davis, Erle Stanley Gardner, Graham Greene, Fannie Hurst, Frances Parkinson Keyes, Sinclair Lewis, Philip MacDonald, Cecile Hulse Matschat, Mary O'Hara, Ellery Queen, Georges Simenon, Rex Stout and Eudora Welty.
 To date, 382 Gold Seal Novels have been cataloged by collectors.
Erle Stanley Gardner (July 17, 1889 – March 11, 1970) was an American lawyer and author.
 Though best known for the Perry Mason series of detective stories, he wrote numerous other novels and shorter pieces, as well as a series of nonfiction books, mostly narrations of his travels through Baja California and other regions in Mexico.
Paula Fox (April 22, 1923 – March 1, 2017) was an American author of novels for adults and children and of two memoirs.
 For her contributions as a children's writer she won the biennial, international Hans Christian Andersen Award in 1978, the highest international recognition for a creator of children's books.
 She also won several awards for particular children's books including the 1974 Newbery Medal for her novel "The Slave Dancer"; a 1983 National Book Award in category Children's Fiction (paperback) for "A Place Apart"; and the 2008 Deutscher Jugendliteraturpreis for "A Portrait of Ivan" (1969) in its German-language edition "Ein Bild von Ivan".
The New Perry Mason is a 1970s TV series that was a revival of the long-running hit television series of the 1950s and '60s about Erle Stanley Gardner's brilliant defense attorney.
 While several production personnel had worked on the original "Perry Mason" series (including executive producer Cornwell Jackson, producers Ernie Frankel and Art Seid, and director Arthur Marks), the series was made without the participation of any members of the original cast, with Monte Markham taking over the role that Raymond Burr played in the original series.
 Produced by 20th Century Fox Television, it aired Sundays at 7:30 pm (EST) on CBS, the same network which had aired the original series, during the 1973-74 season.
 A total of 15 episodes were produced and aired.
Perry Mason is a radio crime serial based on the novels of Erle Stanley Gardner.
 Broadcast weekdays on CBS Radio from 1943 to 1955, the series was adapted into "The Edge of Night" which ran on television for an additional 30 years.
This is a list of episodes for "Perry Mason", an American legal drama series that aired on CBS television for nine seasons (September 21, 1957 – May 22, 1966).
 The title character, portrayed by Raymond Burr, is a fictional Los Angeles criminal defense lawyer who originally appeared in detective fiction by Erle Stanley Gardner.
 Many episodes are based on novels and short stories written by Gardner, with some stories having been adapted more than once.
This is a bibliography of works by and about the American writer Erle Stanley Gardner.
Perry Mason is an American legal drama series originally broadcast on CBS television from September 21, 1957, to May 22, 1966.
 The title character, portrayed by Raymond Burr, is a fictional Los Angeles criminal defense lawyer who originally appeared in detective fiction by Erle Stanley Gardner.
 Many episodes are based on stories written by Gardner.
Special Investigator is a 1936 RKO Radio Pictures American crime-drama film, starring Richard Dix and featuring Margaret Callahan, Erik Rhodes and Owen Davis, Jr..
 It was directed by Louis King from a screenplay by Louis Stevens, Thomas Lennon and Ferdinand Reyher, based on "Fugitive Gold", a story by Erle Stanley Gardner originally serialized in the "New York Herald Tribune"'s "This Week" magazine from May 26–July 7, 1935.