Principles for progress in world agriculture
Harrar, Jacob George.
Principles for progress in world agriculture - New York : The Rockefeller Fundation, 1966 - 16 p.
73970
Agricultura.
Alimentos--Abastecimiento.
Principles for progress in world agriculture - New York : The Rockefeller Fundation, 1966 - 16 p.
73970
Agricultura.
Alimentos--Abastecimiento.
