00351nam a2200145   450000100060000000300030000600500170000900800410002603500190006703500180008605000230010410000220012724500260014926000300017518852UR20220428191251.0061103|||||||||||||||||||||||||||||||| d  a(janium) 18841  a(janium)18840 4aR114b.P4 1998 v.41 aPerez Tamayo, Ruy10aArticulos cientificos  bEl Colegio Nacionalc1998