Ключевые слова: animals, background, beautiful, beauty, bulgaria, card, collection, communication, correspondence, deliver, domestic, dorable, envelope, ewe, fauna, history, hobby, lamb, letter, lovely, macro, mail, nature, nose, obsolete, old, paper, past, perforated, pet, philately, post, postage, postal, postmark, pupils, ram, retro, sheep, stained, stamp, tropical, vintage, wildlife, zoology,