components", published April 17, 1951, assigned to Wild Heerbrugg AG RudolfKingslake, A history of the photographic lens, Boston : Academic Press, 1989
1985, 1re éd., 258 p. (ISBN 0-85274-790-X et 978-0852747902) (en) RudolfKingslake, A History of the Photographic Lens, Academic Press, 1989, 334 p. (ISBN 0-12-408640-3