By Brouwer I.A.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|92|2|183-184

Elsevier‎(2000)‎

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By Brouwer I.D.   Hoorweg J.C.   van Liere M.J.   in World Development

ISSN:0305-750X|25|2|255-266

Elsevier‎(1997)‎

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