Leaper, C.J. The first principles of photography : an elementary treatise on the scientific principles upon which practical photography depends : illustrated / by Clement J. Leaper; C.J. Leaper .— : Iliffe & Son, 1892 .— 273 с. — Lang: eng .— URL: https://rucont.ru/efd/93040 (дата обращения: 12.11.2025)