00338nam a2200109Ia 4500008004100000040001100041100001900052245005400071260007600125300001600201300001100217251112s9999||||xx |||||||||||||| ||und||  aCNCLSA  aM. Abercrombie 0aJournal of Embryology and Experimental Morphology  cApril 1, 1987bThe University of Texas Medical Branch, GalvestonaTexas  aP. 595-1054  bV. 138