00876cam a22002531 4500 sg 46000287 DLC 20260227112750.0 840518s1946 ilu 000 0 eng c sg 46000287 (OCoLC)10747984 U. S. Surg.-Gen. Off. Libr. MdU-H MdU-H DLC premarc n-us--- R723.5 .S5 614.2 Simpson, Herbert Downs, 1879- Health protection, a study of pre-payment medical service plans, by Herbert D. Simpson ... Chicago, The National Physicians' Committee for the Extension of Medical Service [1946] 78 p. 28 cm. Health insurance. Health maintenance organizations United States. National Physicians' Committee for the Extension of Medical Service. 90855 90855