Williams, J. Whitridge, Williams obstetricia / F. Gary Cunningham ... [et al.] - 2a. ed. [tr. 23a. Ed. ing.] - México : McGraw Hill, 2011 - xv, 1385 p. : il. ; 29 cm Incluye bibliografía ISBN: 978-607-15-0463-0 Subjects--Topical Terms: Obstetricia Dewey Class. No.: 618.2 / W673o National Library of Medicine Call No.: WQ100