William W. Cummings

• Scott 1995 Standard Postage Stamp Catalogue: European Countries and Colonies, Independent Nations of Africa, Asia, Latin America
• Scott 1995 Specialized Catalogue of United States Stamps (Scott Specialized Catalogue of United States Stamps)
• 1982 United States Stamp Catalog with United Nations
• 1990 Standard Postage Stamp Catalogue
• Scott 1993 Standard Postage Stamp Catalogue
• Scott 1995 Standard Postage Stamp Catalogue
• Scott Specialized Catalogue of United States Stamps, 1984