The printer's guide to pH
By: [by] E.J. Pritchard.
Contributors: Pritchard, E. J.
Series: Pira visual aid kit -- 8
Published: 1969
Place of publication: [Leatherhead, Eng
Language: eng
Number of pages: 69
Subjects: Hydrogen-ion concentration -- Measurement; Paper -- Printing properties
Notes: "A Pira training activity."

Bibliography: leaf 67.

Leaf 47 in duplicate.