00490nam a2200193Ia 4500001000700000003000500007008004100012010001100053040000900064082001500073100003000088245006000118260003700178300001100215440000500226500000500231503000500236650005500241Z_4580CHAP220113s1967 xx 000 0 und d a167655 cCHAP a636.087 B7 aBriggs, Michael H ed. aUrea as a protein supplement /cpor Michael H. Briggs aOxford :bPergamon Press,c1967 a466 p. a a a aUrea en alimentacioĢn animal I. Briggs, Michael H