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Sound Sleep: Proved Methods of Attaining It by Wilfred Northfield Publication: UK The Psychologist Manfield House 1937 Description: 47 pages , 18 cm. Series: Practical Psychology Handbooks .9 Date: 1937 Availability: Items available: (1)

Will- Power: Ways to Develop It by John Kennedy Publication: UK The Psychologist 1938 Description: 56 pages , 19 cm. Series: Practical Psychology Handbooks .10 Date: 1938 Availability: Items available: (1)