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Photosynthesis of Calendula officinalis L. and Impatiens pa.. 

Mededelingen Landbouwhogeschool, Wageningen, Nederland ; 73,8;Laboratory of Plant Physiological Research, Agricultural University, Wageningen, The Netherlands. Communication ; 342;Communication on Photosynthesis ; 111
Groen, J. , 1973
Exemplar:  Zentrale:Magazin ch 3530