Title: Mezhdunarodnyĭ simpozium Basseĭny chernoslant͡s︡evoĭ sedimentat͡s︡ii i svi͡a︡zannye s nimi poleznye iskopaemye, 5-9 avgusta 1991 g., Novosibirsk
Subjects: Congresses, Organic geochemistry, Shales, Black shales