Jacobson, Kurt I., 1906- Enlarging by C. I. Jacobson, L. A. Mannheim - 22d rev. ed. - London : Focal Press, 1975 - 528 p. : ill. ; 22 cm. Includes index ISBN: 0240509137 Subjects--Topical Terms: Photography--Enlarging National Library of Medicine Call No.: TR475 / .J17e 1972 9