Lens-work for amateurs,
Orford, Henry.
Lens-work for amateurs, by Henry Orford, revised by A. Lockett. - 5th ed. - London, New York [etc.] Sir I. Pitman & sons, ltd., 1931. - 2 p. l., vii-xv, 231 p. illus., diagrs. 19 cm.
32019245
Lenses.
QC385 / .O6 1931
681.42
Lens-work for amateurs, by Henry Orford, revised by A. Lockett. - 5th ed. - London, New York [etc.] Sir I. Pitman & sons, ltd., 1931. - 2 p. l., vii-xv, 231 p. illus., diagrs. 19 cm.
32019245
Lenses.
QC385 / .O6 1931
681.42