Brent, C. A short and accurate method of obtaining the latitude at sea : from an ex-meridian altitude of a heavenly body (declination 0-70) : to which is added a brief explanation, with examples of the new navigation, as applied to the double altitude problem / by Charles Brent, Albert F. Walter, Geo. Williams; C. Brent .— : George Philip & Son [и др.], 1886 .— 87 с. — Lang: eng .— URL: https://rucont.ru/efd/125466 (дата обращения: 07.11.2025)