Postal progress :
an accounting of stewardship.

APA Citation

United States. Post Office Department. (1968). Postal progress: an accounting of stewardship. [Washington, D.C.: Post Office Dept., United States of America] .

MLA Citation

United States. Post Office Department. Postal Progress: an Accounting of Stewardship. [Washington, D.C.: Post Office Dept., United States of America] , 1968.

Warning: These citations may not always be complete (especially for serials).