While many OPAL libraries have resumed lending and borrowing, some continue to operate at reduced service levels or limit in-person use to their campus community. Note that pickup services and procedures may differ between libraries. Please contact your library regarding open hours, pickup procedures, specific requests, or other assistance.
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U S Geological Survey Water Supply Paper : Stream water quality in the conterminous United States--status and trends of selected indicators during the 1980's / by Richard A. Smith, Richard B. Alexander, and Kenneth J. Lanfear.
U S Imports History Dvd Rom : U.S. imports history : historical summary ... : international harmonized system commodity classification (HTSUSA) by country, by customs district / Foreign Trade Division.