00000cam 2200000zi 4500 9.958992 CaOODSP 20260115153834 m o d f cr bn||||||||| 260115e19781206oncd obt f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- En57-58/864-1978E-PDF Sheppard, B. E. (Brian E.) author. Experiments to determine the luminance contrast threshold - a review / by Brian E. Sheppard = Expérience visant à déterminer de seuil de contraste de la luminance - compte rendu de publications / par Brian E. Sheppard. Expérience visant à déterminer de seuil de contraste de la luminance - compte rendu de publications Downsview, Ontario : Environment Canada, Atmospheric Environment Service, 6 December 1978. 1 online resource (16 pages, 2 unnumbered pages) : graph. text txt rdacontent computer c rdamedia online resource cr rdacarrier Technical memoranda, 0068-7804 ; TEC 864 ISSN of series should read: 0708-2878. "UDC: 551.591"--Cover. "6 December 1978"--Cover. Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (pages 10-11). Includes abstracts in English and French. Meteorological optics. Visibility Measurement. Optique météorologique. Visibilité Mesure. Technical reports lcgft Rapports techniques rvmgf Canada. Atmospheric Environment Service, issuing body. Technical memoranda (Canada. Atmospheric Environment Service) TEC 864. (CaOODSP)9.934501 PDF 771 KB https://publications.gc.ca/collections/collection_2026/eccc/en57/En57-58-864-1978-eng.pdf