By Spence M.R.   in Maternal and Child Health Journal

ISSN:1092-7875|7|3|197-203

Springer Publishing Company ‎(2003)‎

Access to resources Favorite 16.588415

By McCormack W.M.   Spence M.R.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|86|2|135-138

Elsevier‎(1999)‎

Access to resources Favorite 11.751708

By Harwell T.S.   Moore K.R.   Spence M.R.   in Preventive Medicine

ISSN:0091-7435|37|4|297-303

Elsevier‎(2003)‎

Access to resources Favorite 9.678157