San Juan, PR : Publicaciones Yuquiyu , 1999 .
[5], ii, 243, [3] p. 28 cm..

Aurora, Colo. Mid-continent Regional Educational Laboratory 2001 .
55 p. , Shipping list no.: 2004-0336-M. | Cover title. 28 cm..

Buenos Aires | exico Novedades Educativas 2005 .
93 p. 26 cm..
9875380687 | 9789875380684

By Burgos Loyo , Nydia E..
2010 .
xvi, 233 leaves 29 cm.

By Cruz Flores, Paula C..
2012 .
xiii, 166 leaves 29 cm..