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3
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Bulrush millet in Zambia : (with special reference to Western province) : field observations and document review / Petra Penninkhoff.
- Royal tropical institute (KIT),
- 1989.
- Amsterdam :
-
India agricultural review mission : field crops research with emphasis on pulses and oilseeds / by P.J. van Rijn.
- Royal tropical institute (KIT). Rural development programme,
- 1989.
- Amsterdam :
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Enhanced Oil Recovery / Edited by Erle C. Donaldson, George .V. Chilingarian and Tehfu Yen.
- 622.3382
- Elsevier Science,
- 1989.
- Amsterdam :