Mental Power
Mental Power
through Sleep Suggestion and Controlled Relaxation
Mental Power
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Summary

Two Techniques of Reaching and Influencing the Subsconscious[sic]

Third Edition

References

“‘THOUGHT of Using Sleep for Learning, Self-Improvement?’ Fascinating science explained: ‘Mental-Power Through Sleep-Suggestion,’ $1. Melvin Powers, 1324 Wilshire, Los Angeles 17P, Calif.”
– Popular Mechanics, May 1952