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1989
Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1989) Gloom as a psychophysical phenomenon. Lighting Research and Technology 21 (3), pp. 89-97. ISSN 1477-1535.
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Shepherd, Alex J. and Julian, W.G. and Purcell, A.T. (1989) Gloom as a psychophysical phenomenon. Lighting Research and Technology 21 (3), pp. 89-97. ISSN 1477-1535.