Precision densitometers for photographic photometry

[11] PRICE, 1924, NATURE, P351

[12] SCHOEN, 1923, J O S A R S I, V7, P483

[13] SIEGBAHN, 1924, PHIL MAG, V48, P217

[14] STETSON, 1916, AP J, V43, P325

[15] STETSON, 1916, AP J, V43, P253

[16] STETSON, 1923, ASTROPHYSICAL J, V58, P36

[17] TOY, 1924, P PHYS SOC LOND, V36, P432

[18] TOY, 1924, J SCI I, V1, P362

[11] PRICE, 1924, NATURE, P351

[12] SCHOEN, 1923, J O S A R S I, V7, P483

[13] SIEGBAHN, 1924, PHIL MAG, V48, P217

[14] STETSON, 1916, AP J, V43, P325

[15] STETSON, 1916, AP J, V43, P253

[16] STETSON, 1923, ASTROPHYSICAL J, V58, P36

[17] TOY, 1924, P PHYS SOC LOND, V36, P432

[18] TOY, 1924, J SCI I, V1, P362