00814cam a22002291 4500 agr26001515 DLC 20260227110946.0 771219s1926 enkf 000 0 eng c agr26001515 (OCoLC)3502050 Library, U.S. Dept of Agriculture CCC CCC DLC premarc QC391 .D67 Dobson, G. M. B. (Gordon Miller Bourne), 1889- Photographic photometry; a study of methods of measuring radiation by photographic means, by G. M. B. Dobson, I. O. Griffith, D. N. Harrison. Oxford, Clarendon Press, 1926. 121 p. plates, diagrs., 19 cm. Photometry. Griffith, Idwal Owain, joint author. Harrison, Douglas Neill, joint author. 9064 9064