005540000a22001570004500003000900000005001700009700002100026710004700047245011700094264004500211490007000256300000900326041000800335650002500343650002800368PH-MaWHO20241108112202.01 aBergsma, D.eed. aSymposium on the Placenta, New York, 1964.0 aPlacenta; its form and functions, with particular reference to the prevention of birth defects and fetal deaths. aNew York : bNational Foundation,c1965. a(Birth defects; original article series, v.1, no. 1, April 1965). a95p. aeng aPlacentaxCongresses aPregnancy complications