RT Journal Article SR Electronic T1 A CHEMICAL METHOD OF ASSAYING THE ACTIVE PRINCIPLES OF DIGITALIS JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 205 OP 220 VO 20 IS 3 A1 ARTHUR KNUDSON A1 MELVIN DRESBACH YR 1922 UL http://jpet.aspetjournals.org/content/20/3/205.abstract AB