Active list of permissible explosives and blasting devices approved before Dec. 31, 1972
By: by J. Ribovich and R.W. Watson.
Contributors: Watson, Richard William, 1927-
Series: Bureau of Mines information circular -- 8597; Information circular (United States. Bureau of Mines) -- 8597.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1973
Place of publication: [Washington]
Language: eng
Number of pages: 10
Subjects: Explosives -- Law and legislation -- United States.; Blasting.; Coal mines and mining -- Explosives.
Notes: "Supercedes Information circular 8493."

Chiefly tables.

Bibliography: p. 7.