544,334 ORAL Oral health care systems : an international collaborative study : coordinated by the World Health Organization / ed. by a Committe composed of Harald A. Amljot [et al.] ;pref. by Edward N. Brandt; forew. by Halfdan Mahler. — [London]: Publ. by Quintessence Publ. Co. Ltd; [Geneva]: World Health Organization, [1985]. — XVIII, 218 s. : wykr.; 25 cm ISBN 1-85097-001-7