Agricultural development soil, food, people, work

Xehetasun bibliografikoak
Egile nagusia:	Kellogg, Charles Edwin 1902-
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	Madison, Wis. Soil Science Society of America 1975.
Gaiak:	Agriculture. Agriculture > Developing countries. Soil science.