Schweidler, M., & Perkinson, R L. (2006). The restoration of engravings, drawings, books, and other works on paper(2nd printing.). Los Angeles: The Getty Conservation Institute.

The restoration of engravings, drawings, books, and other works on paper / Max Schweidler. Transl., ed., and with an appendix by Roy Perkinson . — 2nd printing.. — Los Angeles : The Getty Conservation Institute, 2006. — XIII, 301 S.; zahlr. Ill; 28 cm. — ISBN 0892368357, 9780892368358

Schweidler, Max, and Roy L. Perkinson. The Restoration of Engravings, Drawings, Books, and Other Works On Paper.2nd printing.Los Angeles: The Getty Conservation Institute, 2006.