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Seeds of change : the green revolution and development in the 1970's / Lester R. Brown ; forew. by Eugene R. Black.
- Praeger,
- cop. 1970.
- New York [etc.] :
-
Communist China's agriculture : its development and future potential / by Owen L. Dawson.
- 851.1
- Praeger,
- cop. 1970.
- New York [etc.] :