BOOKQUE

Index to River Surveys Made by the United States Geological Survey and Other Agencies: Revised to July 1, 1947
Benjamin Earl Jones , Randolph Olaf Helland
· 1948
No image available
Preliminary Index to River Surveys Made by the United States Geological Survey and Other Agencies, by Benjamin E. Jones and Randolph O. Helland. [U.S. Geological Survey Water Supply Paper 558.].
United States. Congress. House
· 1925
No image available
Water Power in the Middle Fork of the Willamette River and Tributaries
Randolph Olaf Helland , Geological Survey (U.S.)
· 1944
No image available
Potential Water Power in the Grande Ronde River Basin, Oregon and Washington
Randolph Olaf Helland
· 1932
No image available
Water Utlization in the Coos River Basin, Oregon
Randolph Olaf Helland
· 1947
No image available
Water Power Resources of Molalla River Basin, Oregon
Randolph Olaf Helland
· 1927
No image available
Water Utilization in the Crooked River Basin, Oregon
Randolph Olaf Helland
· 1950
No image available
Index to River Surveys Made by the United States Geological Survey and Other Agencies: Revised to July 1, 1947
Benjamin Earl Jones , Ralf Rumel Woolley , Randolph Olaf Helland
· 1946
No image available
Summary of Investigations on Deep Creek, Tributary to Warner Valley
Randolph Olaf Helland , Geological Survey (U.S.)
· 1940
No image available
Water Utilization in the Chewaucan River Basin, Oregon (with Supplement)
Randolph Olaf Helland
· 1938