title: Study of the use of contraceptives by a town and a country population of northern Italy.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003076:Coitus Interruptus; D003267:Contraception / Q000379:methods*; D003271:Contraceptive Agents, Female; D003274:Contraceptive Devices, Female; D003275:Contraceptive Devices, Male; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008875:Middle Aged; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires
chemical_list: D003271:Contraceptive Agents, Female