Klingenberg, Jonathan (20 September 2015). "Counting Quals". Coast Guard Alaska. USCG. Archived from the original on 10 December 2015. Retrieved 7 December 2015.
Klingenberg, Jonathan (20 September 2015). "Counting Quals". Coast Guard Alaska. USCG. Archived from the original on 10 December 2015. Retrieved 7 December 2015.