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Deficiency symptoms in Hevea brasiliensis in Ceylon / by D.H. Constable.
- Rubber research institute of Ceylon,
- 1955.
- [S.l.] :
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Evaluation report on second year's working of community projects / Government of India, Planning commission, Programme evaluation organisation.
- Government of India. Planning commission. Programme evaluation organisation,
- 1955.
- [S.l.] :