Individual differences in night-vision efficiency /
Pirenne, M. H.(Maurice Henri),author.
Marriott, F. H. C.(Francis Henry Charles),author.
O'Doherty, E. F.,author.
Hartline, H. Keffer,1903-author.
McDonald, P. R.,author.
Great Britain.His Majesty's Stationery Office.
Medical Research Council (Great Britain),issuing body.
"Feb. 18, 1957."
"With a section on "Frequency of seeing at low illumination" by H.K. Hartline and P.R. McDonald."