Not "Wiessingerized" but may be useful:

http://pediatrics.aappublications.org/cgi/content/full/101/1/e9

http://archpsyc.ama-assn.org/cgi/reprint/65/5/578

Rees DI & Sabia JJ (2009). The effect of breast feeding on educational
attainment: Evidence from sibling data. *J Hum Cap, 3*, 43-72.

Karen G

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