The importance and role of volunteers for development.
D000293:Adolescent; D000383:Agriculture; D003150:Community Health Workers; D003906:Developing Countries; D004493:Education; D005551:Foreign Professional Personnel; D006266:Health Education; D006801:Humans; D007390:International Agencies; D009747:Nutritional Physiological Phenomena; D014838:Volunteers / Q000600:supply & distribution*