RUBEY, H., LOMMEL, G. E., & TODD, M. W. (1950). Engineering survey: Elementary.-- Ed.3. The Macmillan Company.

RUBEY, Harry, George Edward LOMMEL, and Marion Wesley TODD. Engineering Survey: Elementary.-- Ed.3. New York: The Macmillan Company, 1950.

RUBEY, Harry, et al. Engineering Survey: Elementary.-- Ed.3. The Macmillan Company, 1950.