CUMMINGS MARY A. CONDUCTING 312,158 Conducting medical effectiveness research : a report from the Inter-PORT Work groups / co-eds. Harold I. Goldberg and Mary A. Cummings. - Philadelphia : J.B. Lippincott Co., [1994]. - [2], 110 s. : wykr. ; 25 cm (Medical Care, ISSN 0025-7079 ; vol.32, nr 7. suppl.) ;