AU - BLACK CE TI - SYstem in recording cases PT - JOUR DP - 1909 TA - Journal of the American Medical Association pages = {762-767}, VI - LII IP - 10 AID - 10.1001/jama.1909.25420360018002e [doi] 4100 - http://dx.doi.org/10.1001/jama.1909.25420360018002e SO - Journal of the American Medical Association March 6, 1909 LII(10):762