Haţegan, I.
Bucureşti
Ceres
1972
[1972]
Popescu, Constantin (ing. agr.)
1971
Bistriceanu, Gheorghe D.
1973
Popescu, Barbu (ing.)
1974
Ştirbu, Aurel
Milea, Octavian
Sárkány Pál
1970