00431nam a2200157Ia 4500008004100000082001600041100002000057245005700077260004400134300000800178650002300186650001800209653001600227653001100243653001900254170901s1930    xx            000 0 und d  a581.1bM13G  aMacDougal, D.T. 0aGreen LeafbThe Major Activity of Plants in Sunlight  aNew YorkbD. Appleton and Companyc1930  a142  aBotanical sciences  aPure Sciences  aChlorophyll  aLeaves  aPhotosynthesis