Stratigraficheskiy kodeks SSSR  Vremennyy svod pravil i rekomendatsiy 
 Стратиграфический кодекс СССР  Временный свод правил и рекомендаций  Stratigraphic code of the USSR  Provisional synopsis of rules and recommendations 

 - 148 p. 
<br/><br/> Approved by Interdepartemental Stratigraphic Committee of the USSR May 10, 1976