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3
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Transactions of 7th International congress of soil science, Madison, WI, 1960
- 873
- Elsevier,
- 1961.
- Amsterdam :
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Some aspects of photoperiodism in rice (Oryza sativa L.) / R. Best.
- Elsevier,
- 1961.
- Amsterdam [etc.] :
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Schistosomiasis in the Surinam District of Surinam / E. van Der Kuyp.
- Elsevier,
- 1961.
- Amsterdam :