Perygl perffaith
By: Gary Paulsen ; addasiad Esyllt Nest Roberts.
Contributors: Roberts, Esyllt Nest.
Series: Byd o beryglon Gary Paulsen -- 8
Publisher: Gwasg Carreg Gwalch
Published: 2003
Place of publication: Llanrwst
Language: wel
Number of pages: 77
Subjects: Laboratories -- Juvenile fiction.
Genres: Juvenile fiction.
Work titles: Perfect danger.
Notes: Addasiad Cymraeg gan = Welsh adaptation by : Esyllt Nest Roberts.

Argraffiad Saesneg gwreiddiol = Original English edition : New York : Bantam Doubleday Dell, 1996.

Addasiad Cymraeg o = Welsh adaptation of : Perfect danger.