@book{251962,
	author = {Depart. of Agricultura. Agricultural Research Service},
	title = {Technical Bulletin : Agricultural Research Service},
	publisher = {Depart. of Agricultura. Agricultural Research Service},
	year = {1984},
	address = {Washington},
	note = {BPH: Techn.Bull. U.S.D.A.  Existencias: 1984 no. 1691; 1988 no. 1719; 1990 no. 1755, 1757; 1992 no. 1791, 1796; 2003 no.1890 parte 1 y 2}
}