Size of letters required for visibility as a function of viewing distance and observer visual acuity
An edition of Size of letters required for visibility as a function of viewing distance and observer visual acuity (1983)
By Gerald Leonard Howett
Publish Date
1983
Publisher
U.S. Dept. of Commerce, National Bureau of Standards,For sale by the Supt. of Docs., U.S. G.P.O.
Language
eng
Pages
61
Description:
subjects: Lettering, Visual acuity