APA (7th ed.) Citation

United States. Bureau of Mines. (1923). Concordia type RM 6-o.d. electric cap lamp, approval numbers 19. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Bureau of Mines. Concordia Type RM 6-o.d. Electric Cap Lamp, Approval Numbers 19. [Washington]: [publisher not identified], 1923.

MLA (9th ed.) Citation

United States. Bureau of Mines. Concordia Type RM 6-o.d. Electric Cap Lamp, Approval Numbers 19. [publisher not identified], 1923.

Warning: These citations may not always be 100% accurate.