-
1by Heap, D. P. (David Porter), b. 1843
Published 1884Washington [D.C.] : G.P.O., 1884.viii p., p. 289-647, [25] leaves of plates (24 folded) : ill., maps. -
2Electrical appliances of the present day : being a report on the Paris Electrical Exhibition of 1881by Heap, D. P. (David Porter), b. 1843
Published 1884New York : D. Van Nostrand, 1884.287 p., [15] leaves of plates (7 folded) : ill., maps ; 23 cm.
