Photograph
H. Bentley Hahn Personal Papers
HBHPP-001-028-p0007
"Hartford Sec. Ctr. 07200 to 07499" transparency highlighting the United States Post Office sectional centers and transportation routes in Hartford, Connecticut (slide 6 of 20) for use in a presentation by H. Bentley Hahn titled, "Technical Explanation of Post Office Department's Proposed 'Zip Code' Program for the Postal System."