Dahl, E.J. (2001). "Naval innovation: From coal to oil"(PDF). Joint Force Quarterly (Winter 2000–01): 50–6. Archived(PDF) from the original on 22 October 2016. Retrieved 14 February 2017.
Dahl, E.J. (2001). "Naval innovation: From coal to oil"(PDF). Joint Force Quarterly (Winter 2000–01): 50–6. Archived(PDF) from the original on 22 October 2016. Retrieved 14 February 2017.