Baltimore, Md. R. L. Polk & Co., of Baltimore, Incorporated August 1928. First Edition. [2-ads], 232 pages. 3 x 6 inches. Printed light green wrappers. Laid in is a copy of Trolley News, published by the United Rwailways and Electric Co., Vol XXI, No. 4, Baltimore, March 28, 1930 which talks about Modernizing Baltimore's Transportation. Rear wrappers with advertisements both sides (front inside wrapper as well). Glob of glue to lower part of last page which has pulled away affecting text on previous page (no loss of meaning). This glue may have affixed something else in the rear, most often a local map in these sort of publications, which if originally issued is no longer present. Very Good. Wraps. 
Cover notes price of 25 cents and that R. L. Polk & Co. published the Baltimore City Directory and 700 other cities in the U S. While POLK clearly produced many works related to Baltimore, this particular title is not shown in OCLC, perhaps combined into a serial in some libraries that are termed "Baltimore City Directory".