AU - MARK MF TI - OPtimum time for administration of protamine zinc insulin PT - JOUR DP - 1939 TA - Archives of Internal Medicine pages = {897-906}, VI - 64 IP - 5 AID - 10.1001/archinte.1939.00190050003001 [doi] 4100 - http://dx.doi.org/10.1001/archinte.1939.00190050003001 SO - Archives of Internal Medicine November 1, 1939 64(5):897