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3. R. Reed, in The Nature and Making of Parchment (Elmete, USA, 1975), p. 25.
4. Kh. K. Galfayan, Khudozh. Nasled., No. 1 (31), 77 (1975).
5. M. Skoblikov, Guide to the Dressing of Leather, Sheepskin, and Furs (Tipogr. Depart. Vneshn. Torgovli, St. Petersburg, 1852), p. 244 [in Russian].