por Sperling, Abraham Paul, 1912- [autor] | Pellerano, Alfredo B [traductor] | Sperling, Abraham Paul, 1912-. Psychology mode simple.
por Sperling, Abraham Paul, 1912- [autor] | Pellerano, Alfredo B [traductor] | Sperling, Abraham Paul, 1912-. Psyjchology made simple.