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Start Over You searched for: Collection U.S. Geological Survey professional paper Remove constraint Collection: U.S. Geological Survey professional paper Subject Geology Remove constraint Subject: Geology Title Starts With H Remove constraint Title Starts With: H Publication/Creation Date 1995 to 1999 Remove constraint Publication/Creation Date: <span class="from" data-blrl-begin="1995">1995</span> to <span class="to" data-blrl-end="1999">1999</span>
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