Waltz of the couples: change partners, please.
Haskey
J
J
D001723:Birth Rate; D003710:Demography; D019049:Developed Countries; D004243:Divorce; D005060:Europe; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005298:Fertility; D006285:Health Planning; D007086:Illegitimacy; D008393:Marriage; D011153:Population; D011157:Population Dynamics; D015397:Program Evaluation; D012940:Social Problems