Cross-national study of health systems : countries, world regions and special problems : a guide to information sources /

od Elling, Ray H., 1929-
Izdano 1980

Health system support for primary health care : a study based on the technical discussions held during the thirty-fourth World Health Assembly, 1981 /

od Kleczkowski, Bogdan M., Elling, Ray H., 1929-, Smith, Duane L.
Izdano 1984