Sand waves, bars, and wind-blown sands of the Rio Orinoco, Venezuela and Colombia.  By Carl F. Nordin,Jr. and David Perez-Hernandez
Contributors: Perez-Hernandez, D.
Publisher: U.S. Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 74
Subjects: Sand - Venezuela; Sand - Colombia
Notes: 11