Where have all the flowers gone?
Ball
Philip
P
D000025:Abortion, Eugenic; D000028:Abortion, Induced; D002681:China / Q000208:ethnology; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage / Q000208:ethnology / Q000706:statistics & numerical data / Q000639:trends; D011156:Population Density; D012744:Sex Ratio