1
2
Main Authors: Derr Louis
Published: American Technical Soc.,
Publication Dates: 1914.
Call Number: 620.3/D448
Book
3
Group Author: Derr Louis 1868-1923 (ed.)
Published: American School of Correspondence,
Publication Dates: 2010.
Call Number: TH11/C995/v.3
Book
4
Main Authors: Derr Louis 1868-1923.
Published: Macmillan & Co.,
Publication Dates: 1906.
Call Number: 770/D438
Book
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