The world book : health and medical annual 1991.
Inhalt Karte:WORLD 805,132 The world book : health and medical annual 1991 I [ed. in chief Robert O. Zeleny]. - Chicago [etc.] : World Book, Inc., A Scott Fetzer Company, [1990], - 400 s. : il., wykr. ; 26 cm ISBN 0-7166-1191-0 . - ISSN 0890-4480