Text ( visual ) : unmediated Williams obstetrics. -- 20th ed. / F. Gary Cunningham ... [et al.]. -- Stamford, Conn. : Appleton & Lange , c1997. -- viii, 1448 p. : ill. ; 29 cm. -- Includes bibliographical references and index. -- ISBN 083859638X ; (BA29475455) ; https://ci.nii.ac.jp/ncid/BA29475455 Other Title(s): Obstetrics. -- Author Heading(s): Williams, J. Whitridge (John Whitridge) ; Cunningham, F. Gary. -- Classification(s): LCC : RG524 ; DC20 : 618.2 ; NDC8 : 495.5. -- Subject Heading(s): PRECIS : Obstetrics ; LCSH : Obstetrics ; MESH : Obstetrics