United States. Bureau of Mines. (1929). Advanced mine rescue training: Part IV. Suggested procedure in sealing and unsealing mine fires and in recovery operations. GPO.
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Advanced Mine Rescue Training: Part IV. Suggested Procedure in Sealing and Unsealing Mine Fires and in Recovery Operations. [Washington]: GPO, 1929.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Advanced Mine Rescue Training: Part IV. Suggested Procedure in Sealing and Unsealing Mine Fires and in Recovery Operations. GPO, 1929.
Warning: These citations may not always be 100% accurate.