By Ortiz Brunet , Rita..
San Juan, P.R. Francisco M. Vázquez 1997 .
2 v. 30 cm..

Madrid McGraw-Hill Interamericana 1997 .
xiv, 277 p. 25 cm..
8448601629

By Rosales López, Carlos..
Madrid Narcea 1997 .
188 p. 22 cm..
8427704763

Rockville, Md. SAMHSA, Office of Applied Studies 1997 , "U.S. Dept. of Health and Human Services"

Río Piedras, P.R. : Comité del Centenario de 1898, 1997 .
volumes : 28 cm. .

San Juan, P.R. : [Santurce Medical], 1997 .
volumes : 28 cm. .