Browsing the library shelves by call number ranges is another strategy for locating information on a topic; call numbers can help you get to the "right neighborhood" in the library stacks.
|GB651 - GB2998||Hydrology|
|QC801 - QC849||Geophysics|
|TA703 - TA710.5||Engineering Geology|
The U.S. Geological Survey is a very important publisher in geology. They publish several series, and the following list will direct you to their locations within the Portland State Library.
|QE75.O6||Open-file reports (microforms 3rd floor)|
|GB680.A5||Techniques of water-resources investigations|
|TC423.A365||Water resources investigations report|
Publications of the U.S. Geological Survey