Frederick, A. Bruce. Gimnasia para hombres A. Bruce Frederick; traducción de Mercedes Martínez Dozal. - México Editorial Pax México 1979. - 100 p. illus. Translation of: Gymnastics for men. LCCN: fel36000222 //r81 Subjects--Topical Terms: Gymnastics for men. LC Class. No.: GV461 / .F7 Dewey Class. No.: 796.4/1