Below are the rosters for the 1977 FIFA World Youth Championship tournament in Tunisia. Those marked in bold went on to earn full international caps.
Group A
Head coach: Jack Braun
Head coach: Alfonso Portugal
Head coach: Chus Pereda
Head coach: Mokhtar Ben Nacef
Group B
Head coach: Rodolfo Trinidad Ramirez Godoy
Head coach: Gyula Rákosi
Head coach: Abdallah Ben Barek
Head coach: Agustín Isarch
Group C
Head coach: Evaristo de Macedo
Head coach: George Beniamini
Head coach: Mahmoud Yavari
Head coach: Italo Acconcia
Group D
Head coach: Alfred Hohenberger
Only 16 players in Austria squad. (N°17) Karl Meister MF Lask Linz Austria 24/2/1958 (N°18) Johann Gross FW Rapid Wien Austria 21/12/1959
Head coach: Nedrag Stanković
Head coach: Salvador Breglia
Head coach: Sergei Mosyagin
References
FIFA pages on the 1977 Youth World Cup