@book{147690,
	author = {Sagrera, Martín. and Sagrera, Martín.},
	title = {Population crisis},
	publisher = {Editorial Fundamentos},
	year = {1994.},
	address = {Madrid},
	note = {"This is a new, updated and greatly enlarged edition of the book Sex, population, and politics released in 1990 by the same publisher"--P. 3.}
}