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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United States Office Of Inter American Affairs : Geology and mineral resources of Paraguay - a reconnaissance / by Edwin B. Eckel; with sections on Igneous and metamorphic rocks, by Charles Milton and Edwin B. Eckel; [and] Soils, by Pedro Tirado Sulsona.