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Photosynthesis of calendula officinalis L. and impatiens parviflora DC., as influenced by light intensity during growth and age of leaves and plants
D 148.815 -- GROEN, Jacob: -- Photosynthesis of calendula officinalis L. -- and impatiens parviflora DC.,as influenced -- by light intensity during growth and age -- of leaves and plants. - Wageningen:Veenman -- u.Zonen 1973.129 S.m.8 Tab.u.109 Fig.8° -- Groningen,nat.wiss.Diss.1973. -- 1976! -- M.