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19 p. , Cover title: El coqui explorador, quiénes hacen la arena?

By Melich Orsini, José..
Caracas Academia de Ciencias Políticas y Sociales 1986 .
115 p. 23 cm..
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By Bascom, Willard..
Garden City, N.Y. Anchor Books 1964 .
xii, 267 p. , 921004 19 cm..

[Charleston, S.C. National Oceanic and Atmospheric Administration, Coastal Services Center 2001 .
1 CD-ROM , Shipping list no.: 2004-0019-E. | Title from title screen (index.htm file). | "[A]ssistance provided by ... NOAA's Coastal Services Center and the ... Florida Department of Environmental Protection's Office of Coastal and Aquatic Managed Areas"--Acknowledgements. | "NOAA/CSC/20414-CD"--Disc label. 12 cm..

Mayagüez, P.R. : Programa de Colegio Sea Grant, Universidad de Puerto Rico , 1998 .
51 p. 28 cm..

By Delgado Rodríguez , Jenitza..
2004 .
ix, 66 leaves 29 cm.

By Colón García, Ennio M..
[s.l.] Universidad Interamericana de P.R., Escuela de Derecho 1980 .
p. 28 cm..

[Charleston, S.C. National Oceanic and Atmospheric Administration, Coastal Services Center 2001 .
1 CD-ROM , Shipping list no.: 2004-0019-E. | Title from title screen (index.htm file). | "[A]ssistance provided by ... NOAA's Coastal Services Center and the ... Florida Department of Environmental Protection's Office of Coastal and Aquatic Managed Areas"--Acknowledgements. | "NOAA/CSC/20414-CD"--Disc label. 12 cm..