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2
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The economics of agriculture / by R. L. Cohen. ; With an introd. by C. W. Guillebaud.
- 338.1 C6781
- Cohen, Ruth L. 1906-
- Nisbet,
- 1940
- London :
-
Microbe hunters / by Paul De Kruif.
- 579.3092 D329 1940
- De Kruif, Paul, 1890-1971.
- Pocket Books,
- 1940
- New York :