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Size of letters required for visibility as a function of viewing distance and observer visual acuity

Author: Gerald Leonard Howett; United States. Occupational Safety and Health Administration.; United States. National Bureau of Standards.
Publisher: Washington, DC : U.S. Dept. of Commerce, National Bureau of Standards : For sale by the Supt. of Docs., U.S. G.P.O., 1983.
Series: NBS technical note, 1180.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
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Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Gerald Leonard Howett; United States. Occupational Safety and Health Administration.; United States. National Bureau of Standards.
OCLC Number: 10053254
Notes: "Issued July 1983."
Description: x, 61 pages : illustrations ; 28 cm.
Series Title: NBS technical note, 1180.
Responsibility: Gerald L. Howett ; sponsored by the Occupational Safety and Health Administration, U.S. Department of Labor.

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