The syntonic principle, its relation to health and ocular problems
By: by Harry Riley Spitler ...
Contributors: College of syntonic optometry, Eaton, O.
Published: 1941
Place of publication: Eaton, O
Language: eng
Number of pages: 217
Subjects: Light -- Physiological effect.
Notes: Bibliographical foot-notes. "References" at end of some of the chapters.
"In part an abridgement and in part an amplification of a thesis in part fulfillment of academic requirements for the doctor of philosophy degree."--p. viii.