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Dyfyniad Arddull ChicagoSmith, P.C. Nuptiality Projection Using Coale's Three-parameter Model of Proportions Ever Married. [S.l: s.n.], 1973.
Dyfyniad MLASmith, P.C. Nuptiality Projection Using Coale's Three-parameter Model of Proportions Ever Married. s.n.], 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.