Ключевые слова: 1978, art, astronaut, black, collection, communication, correspondence, cosmonaut, cosmos, country, czechoslovakia, delivery, first, flight, grechko, history, isolated, known, macro, mail, man, meeting, message, micro, national, object, old, overprint, paper, perforation, philatelic, philately, post, postage, postal, postmark, print, rocket, romanenko, space, stamp, symbol, ussr,