by Ladner, C N, Weston, P V, Brinkman, 3rd, C R, Assali, N S
Published in American journal of obstetrics and gynecology (01.10.1970)

by HERRICK, C N, LADNER, C N, PEARSON, J W, HARRISON, H E
Published in Obstetrics and gynecology (New York. 1953) (01.12.1964)

by Assali, N S, Brinkman, 3rd, C R, Dilts, Jr, P V, Ladner, C N
Published in Obstetrical & gynecological survey (01.08.1969)