Alonso Mudarra
Alonso Mudarra( c. 1510 – April 1, 1580) was a Spanish composer of the Renaissance, and also played the vihuela, a guitar- shaped string instrument.
He was an innovative composer of instrumental music as well as songs, and was the composer of the earliest surviving music for the guitar.
Henri Verdun
Henri Verdun( 1895–1977) was a French composer of film scores.
Amedeo Escobar
Amedeo Escobar( 1888–1973) was an Italian composer of film scores.
Bert Grund
Bert Grund( 1920–1992) was a German composer of film scores.
Neal Hefti
Neal Paul Hefti (October 29, 1922 – October 11, 2008) was an American jazz trumpeter, composer, and arranger.
He wrote music for "The Odd Couple" movie and TV series and for the "Batman" TV series.
He began arranging professionally in his teens, when he wrote charts for Nat Towles.
He became a prominent composer and arranger while playing trumpet for Woody Herman; while working for Herman he provided new arrangements for "Woodchopper's Ball" and "Blowin' Up a Storm" and composed "The Good Earth" and "Wild Root".
After leaving Herman's band in 1946, Hefti concentrated on arranging and composing, although he occasionally led his own bands.
He is especially known for his charts for Count Basie such as "Li'l Darlin'" and "Cute".
Thomas Morse
Thomas Morse( born June 30, 1968) is an American composer of film and concert music.
Duel at Sundown (film)
Duel at Sundown is a 1965 West German and Italian western film directed by Leopold Lahola.
Duel at Diablo
Duel at Diablo is a 1966 western film starring James Garner in his first Western since leaving "Maverick" and Sidney Poitier in his first Western.
Based on Marvin H. Albert's 1957 novel "Apache Rising", the film was written by Albert and Michael M. Grilikhes and directed by Ralph Nelson who had directed Poitier in "Lilies of the Field".
The supporting cast includes Bibi Andersson, Bill Travers, Dennis Weaver and John Hoyt; Ralph Nelson has a cameo as an Army Major.
The movie was shot on location amidst striking scenery in Utah; the musical score was composed by Neal Hefti.
Abe Meyer
Abe Meyer( 1901 – 1969) was an American composer of film scores.
Walter Ulfig
Walter Ulfig was a German composer of film scores.

Question: What nationality is the composer of film Duel At Diablo?
Answer: American