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Shipworm experiments during the period 1938-1970 : a comparative study of the resistance of tropical timber to shipworm
- Royal tropical institute. Department of agricultural research,
- 1972.
- Amsterdam :
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International rubber conference "Rubbercon 72 and Rubberex 72", Brighton, England, 15-19 May 1972 / by G. Verhaar.
- Royal tropical institute. Department of agricultural research,
- 1972.
- Amsterdam :
-
De Mao-strips/Deel twee.
- B. V. Uitgeverij de Arbeiderspers,
- 1972.
- Amsterdam :