Letter to Helen Gardner McCormack from Robert Kingery (Chicago Regional Planning Association) (July 1, 1941) regarding request for publications about regional planning.
Letter to Helen Gardner McCormack from Pearl Chase (Plans and Planting Committee of the Community Arts Association) (Aug. 18, 1941) regarding request for publications about regional planning.
Letter to Helen Gardner McCormack from Elmer R. Coburn (State of Connecticut Development Commission) (July 31, 1941) regarding request for city planning materials.
Letter to William N. Beach (Rice Hope Plantation from Homer M. Pace (Nov. 18, 1941) informing him about the work of the Regional Planning Committee and upcoming exhibit.