King, C. L. 1., & Blankenburg, R. (1912). A study of trolley light freight service and Philadelphia markets: In their bearing on the cost of farm produce. Philadelphia [PA]: Dept. of Public Works.

King, Clyde L. 1879-1937., and Rudolph Blankenburg. A Study of Trolley Light Freight Service and Philadelphia Markets: In Their Bearing On the Cost of Farm Produce. Philadelphia [PA]: Dept. of Public Works, 1912.

King, Clyde L. 1879-1937., and Rudolph Blankenburg. A Study of Trolley Light Freight Service and Philadelphia Markets: In Their Bearing On the Cost of Farm Produce. Philadelphia [PA]: Dept. of Public Works, 1912.