Yearbook of Agriculture Food and Life

Autor: United States Deparment of AgricultureLugar y Editorial: WashingtonFecha: 1939..

Yearbook of Agriculture Grass

Autor: United States Deparment of AgricultureLugar y Editorial: WashingtonFecha: 1948..

Yearbook of Agriculture Keeping Livestock Healthy

Autor: United States Deparment of AgricultureLugar y Editorial: WashingtonFecha: 1942..

Yearbook of Agriculture Soils and Men

Autor: United States Deparment of AgricultureLugar y Editorial: WashingtonFecha: 1938..

¿Son las Semillas Patentable?

Autor:  Fleury, Jean-MarcLugar y Editorial:  CIID Informa, OttawaFecha: &nb..