Cite

Connor, Eugene, 1897-1973. "Traffic Signs and Signals, January to December 1961." Birmingham Public Library (Ala.). 1961, http://cdm16044.contentdm.oclc.org/cdm/ref/collection/p16044coll1/id/21803.

Connor, Eugene, 1897-1973 (1961). Traffic Signs and Signals, January to December 1961. Retrieved from http://cdm16044.contentdm.oclc.org/cdm/ref/collection/p16044coll1/id/21803

Connor, Eugene, 1897-1973. "Traffic Signs and Signals, January to December 1961." 1961. July 20, 2025. http://cdm16044.contentdm.oclc.org/cdm/ref/collection/p16044coll1/id/21803.