Eight inch diameter pneumatic tubes : the standard system adopted by the United States Post Office : used for carrying the mails in Boston, Brooklyn, Chicago, New York, Philadelphia and St. Louis
Eight inch diameter pneumatic tubes : the standard system adopted by the United States Post Office : used for carrying the mails in Boston, Brooklyn, Chicago, New York, Philadelphia and St. Louis.
Published
Boston, Mass. : American Pneumatic Service Co. [1914?]