*SCE OL4T = Laity
 
Williams, Ramon 0.
Navigation problems and solutions. Practical work, solutions, plotting, almanac data, by Ramon O. Williams and George W. Mixter. New York, D. Van Nostrand [1951]
162 p. illus. 28cm.
"Based on Primer of navigation key, by G. W. Mixter and R. 0. Williams, originally published in 1943."
1. Navigation--Problems, exercises, etc. I. Mixter, George Webber, 1870- Primer of
navigation. & IE. Titles MB