Typographia, or, The printer's instructor : a brief sketch of the origin, rise, and progress of the typographic art : with practical directions for conducting every department in an office, hints to authors, publishers, &c. (1861)
Adams, Thomas F · Philadelphia : L. Johnson & Co. · leaf 139
TYPOGRAFIIIA, ... 131 Inner Form of Octavo, 12 0/ the Work, and 4 other Matter. '4-' Inner Form of a Sheet of Octavo, of Hebrew Work. … 12
Printing -- History · Printing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.