Help about newborns

Szostek Krzysztof (SZOS@ZUK.IZ.UJ.EDU.PL)
Wed, 6 Mar 1996 10:37:33 MET+2

Dear Colleagues,

If somebody know about a literature deal seasonality of births and
data about the newborns from this point of view (proportion of
sex, metrical traits, duration of pregnancy, age of mothers) in last
4-5 years, please send the information.

Please write
Krzysztof Szostek