BUTLER, W L A far-red absorbing form of chlorophyll. in vivo. [electronic resource] - Archives of biochemistry and biophysics May 1961 - 413-22 p. digital Publication Type: Journal Article ISSN: 0003-9861 Standard No.: 10.1016/0003-9861(61)90287-9 doi Subjects--Topical Terms: Chlorophyll