Demografía
Subtitle: Controla el mundo sus nacimientos?
By: [por] Arturo Calle R. [y] Jorge Vélez O.
Contributors: Vélez Ochoa, Jorge, joint author.
Publisher: Tercer Mundo
Published: 1971
Place of publication: [Bogotá]
Language: spa
Number of pages: 218
Subjects: Demography.
Notes: Bibliography:  p. [221-224]