The Lords of Salt : Provadia-Solnitsata 5600-4350 BC : exhibition on the occasion of 20th anniversary years of archaeological explorations at the earliest prehistoric salt-production and urban centre / Vassil Nikolov, head of research ; Galina Samichkova, curator  Sofia : Prof. Marin Drinov Publishing House of BAS, 2024 . 200 stran . ISBN 978-619-254-045-6 (brožováno) .   [1, currently available 1]