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Government Publications

United States Postal Service

The United States Postal Service (USPS) is an independent agency of the United States federal government responsible for providing postal service in the United States. It is one of the few government agencies explicitly authorized by the United States Constitution.

Source from: United States Postal Service Wikipedia Page

Table 1. United States Postal Service Publication Location
Sudoc Number Publication

P 1.10/8:

ZIP Code Look-Up

P 1.10/5:

International Mail Manual

P 1.12/11:

Domestic Mail Manual