How of line cuts and half tones.

Bibliographic Details

Corporate Author:	United States. Government Printing Office
Format:	Government Document eBook
Language:	English
Published:	[Washington] : GPO, 1931.
Series:	Govt. Printing Office Apprentice Series No. 3
Subjects:	Photography. Printing. Electronic books.
Online Access:	Connect to the full text of this electronic document