Laboratory experiments in biological chemistry. Authors: James Batcheller Sumner & George Fred Somers. 2nd ed., rev. & enl.
R651657. Laboratory experiments in biological chemistry. Authors: James Batcheller Sumner & George Fred Somers. 2nd ed., rev. & enl. © 28Jul49; A35249. Academic Press, Inc. (PWH); 14Jan77; R651657.
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