Problemy obrazovani︠i︡a rudnykh stolbov. (Materialy simpoziuma, sosto︠i︡avshegos︠i︡a 8-12 dek. 1969 g., Novosibirsk) - Shakov, Feliks Nikolaevich, 1894- ("Nauka," Sib. otd-nie, 1972)