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4
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Organisation and administration of agricultural research / I. Arnon.
- Elsevier,
- 1968.
- Amsterdam [etc.] :
-
Sugar cane factory analytical control : the official methods of the Hawaiian sugar technologists / ed. by John H. Payne.
- Elsevier,
- 1968.
- Amsterdam [etc.] :
-
Study week on organic matter and soil fertility, April 22-27, 1968 = Semaine d'étude sur le thème matière organique et fertilité du sol, 22-27 avril, 1968 / [contrib. by H. Jenny...et al.].
- North-Holland publishing company [etc.],
- 1968.
- Amsterdam [etc.] :
-
[Suriname] / Holland Herald.
- Holland Herald,
- 1968.
- Amsterdam [etc.] :