Thực đơn
Tàu_ngầm_lớp_EchoThực đơn
Tàu_ngầm_lớp_EchoLiên quan
Tài liệu tham khảo
WikiPedia: Tàu_ngầm_lớp_Echo http://ship.bsu.by/main.asp?id=102191 http://ship.bsu.by/main.asp?id=102192 //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... http://www.deepstorm.ru/DeepStorm.files/45-92/nsrs... http://www.deepstorm.ru/DeepStorm.files/45-92/nsrs... https://books.google.com/books?id=l-DzknmTgDUC&pg=... https://books.google.com/books?id=l-DzknmTgDUC&pg=... https://aad.archives.gov/aad/createpdf?rid=210066&... https://fas.org/nuke/guide/russia/theater/659.htm