Jane T. Helwig

A user's guide to SAS 76

A. J. Barr, J. H. Goodnight, Anthony J. Barr, 1976 .

SAS introductory guide

Jane T. Helwig, 1978 .

Does Midline Episiotomy Increase the Risk of Third- and Fourth-Degree Lacerations in Operative Vaginal Deliveries?

Jane T. Helwig, J. Thorp, W. Bowes, 1993, Obstetrics and gynecology.

Umbilical cord blood acid-base state: what is normal?

Jane T. Helwig, J. Parer, S. Kilpatrick, 1996, American journal of obstetrics and gynecology.