@book{57562,
	author = {Stakman, Elvin Charles. and ENA. Colegio de Postgraduados. Chapingo, Méx.},
	title = {The evolution of concepts and practices in education of seminar lectures geven},
	publisher = {(s.e.),},
	year = {(s.a.)},
	address = {(s.l.) :}
}