003010000a22001210004500003000900000005001700009110001200026245006200038264002900100300001000129041000800139650003200147PH-MaWHO20241108112125.0 aUnesco. aTeacher's study guide on the biology of human population. aParis : bUnesco,c1975. a438p. aeng aPopulationxEducationzAsia