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2
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Science and technology in world history: An introduction / James E. McClellan III and Harold Dorn.
- 509
- McClellan, James Edward, 1946-
- The Johns Hopkins University Press,
- 1999.
- Baltimore :
-
Economic analysis of agricultural Projects/ J. Price Gittinger.
- 338.13 G536 1982
- Gittinger, J. Price 1928-
- The Johns Hopkins University Press,
- c1982.
- Baltimore :