8 unnumbered pages, 148 pages, 1 leaf of plates : illustrations ; 25 cm

Electro-medical instruments and their management / by W.E. Schall.

vi, 232 pages, 8 unnumbered pages of plates : illustrations ; 25 cm

Electro-medical instruments and their management : and illustrated price list of electro-medical apparatus / by Schall & Son.

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