304161 Williams, R. O., & Mixter, G. W. (1951). Navigation problems and solutions: Practical work, solutions, plotting, almanac data. New York : D. Van Nostrand.
Chicago-čujuhus (17. p.)304161 Williams, Ramon O., juo George Webber Mixter. Navigation Problems and Solutions: Practical Work, Solutions, Plotting, Almanac Data. New York : D. Van Nostrand, 1951.
MLA-čujuhus (9. p.)304161 Williams, Ramon O., juo George Webber Mixter. Navigation Problems and Solutions: Practical Work, Solutions, Plotting, Almanac Data. New York : D. Van Nostrand, 1951.
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