OCLC
Reference, Libraries, Library and Information Science, Resource Sharing - OCLC. Online Computer Library Center, Inc.
https://www.oclc.org/
ProQuest - UMI Microfilm
Reference, Libraries, Library and Information Science, Resource Sharing - UMI. Offering a variety of document access products and services.
https://www.umi.com/
Relais International
Reference, Libraries, Library and Information Science, Resource Sharing - Relais International. Interlibrary loan and document delivery system.
https://relais-intl.com/
WebZAP - Electronic Library Request System
Reference, Libraries, Library and Information Science, Resource Sharing - WebZAP. Developed at Colorado State University Libraries, ZAP ILL offers web-based ILL requesting service to your users.
https://www.webzap.org/
US Postal Service International Rates
Reference, Libraries, Library and Information Science, Resource Sharing - US Postal Service International Rates. With an online International Rate Calculator.
https://ircalc.usps.gov/