Active list of permissible explosives and blasting devices approved prior to June 30, 1938.

Similar Items

• Active list of permissible explosives and blasting devices approved prior to June 30, 1938.
  Published: (1938)
• Active list of permissible explosives and blasting devices approved prior to June 30, 1939.
  Published: (1939)
• Active list of permissible explosives and blasting devices approved prior to June 30, 1939.
  Published: (1939)
• Active list of permissible explosives and blasting devices approved prior to June 30, 1930.
  Published: (1930)
• Active list of permissible explosives and blasting devices approved prior to June 30, 1931.
  Published: (1931)