Learn while you sleep : theory and practice of sleep learning.
Curtis, David.
Learn while you sleep : theory and practice of sleep learning. - New York : Libra Publishers, 1960. - 126 p.
Mental suggestion.
Subconsciousness.
Therapeutics, Suggestive.
154.4 / CUR/L
Learn while you sleep : theory and practice of sleep learning. - New York : Libra Publishers, 1960. - 126 p.
Mental suggestion.
Subconsciousness.
Therapeutics, Suggestive.
154.4 / CUR/L