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Farming systems research handbook for Botswana : annex volume : examples of forms and surveys / ed. F. Worman, D. Norman and J. Ware-Snyder.
- Botswana. Ministry of agriculture. Dept. of agricultural research. Agricultural technology improvement project,
- 1990.
- Gaborone :
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Dbase III plus programmes for estimating plant populations and yields from plot quadrat data / by D. Norman and J. Siebert.
- Botswana. Ministry of agriculture. Department of agricultural research. Agricultural technology improvement project,
- 1990.
- Gaborone :
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Row planter condition survey / by D. Norman...[et al.].
- Botswana. Ministry of agriculture. Department of agricultural research. Agricultural technology improvement project (ATIP),
- 1990.
- Gaborone :
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Farming systems research handbook for Botswana / ed. by F. Worman, D. Norman and J. Ware-Snyder ; contrib. by S. Bock...[et al.].
- Botswana. Ministry of agriculture. Department of agricultural research. Agricultural technology improvement project (ATIP),
- 1992.
- Gaborone :