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Official changes in the active list of permissible explosives and blasting devices for October, 1930

Official changes in the active list of permissible explosives and blasting devices for December, 1931

Official changes in the active list of permissible explosives and blasting devices for March, 1931

Official changes in the active list of permissible explosives and blasting devices for April, 1931

Official changes in the active list of permissible explosives and blasting devices for November, 1931

Official changes in the active list of permissible explosives and blasting devices for January, 1931

Official changes in the active list of permissible explosives and blasting devices for August, 1930

Official changes in the active list of permissible explosives and blasting devices for June, 1931

Published Year

1930-1939 (8) *

Subject

Explosives--Safety regulations--1931 (8) *

Author