Prenatal gender preference of mothers of feminine and masculine boys: Relation to sibling sex composition and birth order - Zucker, Kenneth J.; Green, Richard; Garofano, Christina; Bradley, Susan J.; Williams, Katherine; Rebach, Howard M.; Sullivan, Claire B. Lowry (Springer, 1994)
http://dx.doi.org/10.1007/BF02169253
Keywords: CL-CZ