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1.
Detection of conduit-controlled ground-water flow in northwestern Puerto Rico using aerial photograph interpretation and geophysical methods
Author
Rodríguez-Martínez, Jesús
Published
San Juan, P.R. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO : Branch of Information Services [distributor], 2000.
Online
Online book
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
2.
Geological survey research 1974 : a summary of recent significant scientific and economic results accompanied by a list of geologic and hydrologic investigation in progress and a report on the status of topographic mapping
Author
Geological Survey (U.S.)
Published
Washington : U.S. Govt. Print. Off., 1974.
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online