Literature Refraction Tables of Pulkovo Observatory Refraction Tables of Pulkovo Observatory, Science Publishing House
Literature Nautical Astronomy Astro-Navigational Almanac for 1986–1990 Astro-Navigational Almanac for 1986–1990 by GUNIO
Software Nautical Astronomy Posts in Russian 🇷🇺 Astronomy Package Пакет программ для мореходной астрономии