Trigg, E. T. (1929). Philadelphia, wonder city of America: Its 263 diversified industries produce nearly one thirty-third of all manufactures made in America : its port business is in excess of $300,000,000 annually. [Scranton, Pa.: C.F. Miller].

Trigg, Ernest T. Philadelphia, Wonder City of America: Its 263 Diversified Industries Produce Nearly One Thirty-third of All Manufactures Made in America : Its Port Business Is in Excess of $300,000,000 Annually. [Scranton, Pa.: C.F. Miller], 1929.

Trigg, Ernest T. Philadelphia, Wonder City of America: Its 263 Diversified Industries Produce Nearly One Thirty-third of All Manufactures Made in America : Its Port Business Is in Excess of $300,000,000 Annually. [Scranton, Pa.: C.F. Miller], 1929.