Hans Ertl. Complete course in hypnotism in all its phases and related phenomena. In Russian (ask us if in doubt)./Gans Ertl'. Polnyy kurs gipnotizma vo vsekh ego fazakh i v srodstvennykh emu yavleniyakh. A Practical Method for the Rapid and True Study of Hypnotism and the Impact of Suggestion. With 18 Fig. 2 ed. Moscow. Book by P.A. Breitigam (L.F. Breitigam). 1910. 72 p. SKUalb0fb10ce79e17148b.