John Christie Douglas

titleISBN-13
(ISBN-10)
year of publication
A Manual of Telegraph Construction: The Mechanical Elements of Electric Telegraph Engineering978-1-112-58366-7
(1-112-58366-1)
2009

C.D. · J C · J. Christie · J.D. · J. Douglas · John C. · John Christie · John D. · John Douglas

John Christman