Analysis of information sources in references of the Wikipedia article "George Grantham Bain" in English language version.
ca. 40,000 negatives: glass; 4 × 5 in. and 5 × 7 in. about 710 negatives: glass; 8 × 10 in. 64 negatives: nitrate film; 2 1/1 × 3½ in. and 4 × 6 in.
