Sonki S.M. is a professor of singing. The Theory of Voices in Connection with the Physiology of Sound Reproducing Organs In Russian /Sonki S.M. professor peniya. Teoriya Postanovki Golosa v svyazi s fiziologiey organov, vosproizvodyashchikh zvuk. Metodika solnogo peniya. (tut zhe prakticheskie sovety uchashchimsya peniya i artistam). L. Tritons Cooperative Museum Publishing Company, 8th edition, 1925, 153 pp. Please contact us for details on condition of available copies of the book. SKUalbe635806b4d423439