@book{64493,
	author = {North Carolina State University. Raleigh, N.C.},
	title = {The evaluation and improvement of soil fertility in Latin America; annual report.},
	publisher = {The University,},
	year = {1970.},
	address = {Raleigh, N.C. :},
	note = {La biblioteca tiene : 1970, 1971}
}