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Statistics in research : basic concepts and techniques for research workers / Bernard Ostle, Richard W. Mensing.
- 519.5072 O855 1975
- Ostle, Bernard,
- Iowa State University Press,
- 1975. ©1975
- Ames :
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The dynamics of agricultural policy and reform in Zambia / ed. by Adrian Paul Wood...[et al.] ; ill. by A.H. Werner Haas.
- Iowa state university,
- 1990.
- Ames :