Sneyd, J. (1975). Ertragsphysiologische Untersuchungen zur Nutzung von perennierenden Roggenformen im Pflanzenbau. Inaugural-Dissertation zur Erlangung des Doktorgrades im Fachbereich "Angewandte Biologie" der Justus-Liebig-Universität zu Gießen. Thesis. [pubman] 

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