APA (7th ed.) Citation

(1921). Procedure for testing explosives for permissibility for use in gaseous and dusty coal mines with test requirements, tolerance limits, and schedule of fees. GPO.

Chicago Style (17th ed.) Citation

Procedure for Testing Explosives for Permissibility for Use in Gaseous and Dusty Coal Mines with Test Requirements, Tolerance Limits, and Schedule of Fees. [Washington]: GPO, 1921.

MLA (9th ed.) Citation

Procedure for Testing Explosives for Permissibility for Use in Gaseous and Dusty Coal Mines with Test Requirements, Tolerance Limits, and Schedule of Fees. GPO, 1921.