Oskar Gutman. Gimnastika golosa, osnovannaya na fiziologicheskikh zakonakh: Rukovodstvo k uprazhneniyu i pravilnomu upotrebleniyu organov rechi i peniya./Oskar Gutman. Voice Gymnastics Based on Physiological Laws: A Guide to Exercise and Proper Use of Speech and Singing Organs. In Russian - landofmagazines.com

TransliterationOskar Gutman. Gimnastika golosa, osnovannaya na fiziologicheskikh zakonakh: Rukovodstvo k uprazhneniyu i pravilnomu upotrebleniyu organov rechi i peniya.

In EnglishOskar Gutman. Voice Gymnastics Based on Physiological Laws: A Guide to Exercise and Proper Use of Speech and Singing Organs. In Russian

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