Reeves, E.A. Hints to travellers : Surveying and practical astronomy. Vol. 1 / edited for the Council of the Royal Geographical Society by E.A. Reeves; E.A. Reeves .— 9 edition, revised and enlarged .— : The Royal Geographical Society, 1906 .— 597 с. — Lang: eng .— URL: https://rucont.ru/efd/128779 (дата обращения: 17.07.2024)