@article{Farb, author = {Farb, P.}, title = {Humankind, Chapter 7: The Perennial Peasants and Notes and Sources, New York (Bantam), pp. 121-142 and 458-459.}, language = {en} } @book{Farb, author = {Farb, P.}, title = {Humankind. New York (Bantam) 1980.}, language = {en} }