AU - Friedman L TI - A method for the dark field examination of pus for spirochaeta pallida PT - JOUR DP - 1939 TA - Journal of the American Medical Association pages = {134-135}, VI - 112 IP - 2 AID - 10.1001/jama.1939.62800020001008a [doi] 4100 - http://dx.doi.org/10.1001/jama.1939.62800020001008a SO - Journal of the American Medical Association January 14, 1939 112(2):134