APA ציטוט
Helder, W. (1983). Aspects of the nitrogen cycle in wadden sea and Ems-Dollard estuary with emphasis on nitrification.
Chicago Style (17th ed.) Citation
Helder, Willem. Aspects of the Nitrogen Cycle in Wadden Sea and Ems-Dollard Estuary with Emphasis on Nitrification. Groningen, 1983.
ציטוט MLA
Helder, Willem. Aspects of the Nitrogen Cycle in Wadden Sea and Ems-Dollard Estuary with Emphasis on Nitrification. 1983.
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