"Safety catches on mine cages and methods of testing them."; "Harrington, D. (Daniel), 1878-", "East, J. H., Jr. "; "Mine safety."; "East, J. H., Jr. ", "Harrington, D. (Daniel), 1878-"; "1948"; "

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7436 (1948).

"; ""; "P19455"; "pec"; "Mine safety."; "14256"; .