The interests of the College are global and extra terrestrial. Emphasis will be placed on Pennsylvania, the Eastern United States, the Appalachians and the Rocky Mountains, but no area will be excluded. There will be no restrictions for retention based on date. Items can be withdrawn at the discretion of the selector and if material is no longer useful, accurate or in useable condition. Approval plans have been established with Yankee Book Peddler, Harrazzowitz for European titles, Couts for Canadian titles and occasionally others.
Exchanges are in place with several state surveys and institutions.
Gifts are from individuals as well as from library gift lists. Material is collected via firm orders from publishers outside of approval plan profiles, national surveys, professional societies publishing pertinent materials, and other publication outlets as applicable. The Earth collection currently receives publication by the USGS, NOAA, and other select US government agencies through the GPO Depository program. Material is selected from the Canadian Depository program publication list. These arrangements will be maintained and others pursued should a need or opportunity present itself.