312,461 CURRENT Current advances in hydroxyurea therapy /contributors John W. Yarbro [et al]. - Philadelphia : W.B. Saunders C. ; Harcourt Brace Jovanovich, Inc., 1992. - [4], 128 s. : wykr. ; 28 cm (Seminars in Oncology, ISSN 0093-7754 ; vol. 19, nr 3, suppl.9)