J.G. Pratt & H. Forwald: Confirmation of the PK placement effect.
Aktuell Parapsykologi, No 4
A study of psychokinesis in its relation to physical conditions.
Aktuell Parapsykologi, No 3
H. Forwald: Experiments with alternating PK placement and control tests.
Aktuell Parapsykologi, No 1
C.D. Broad: Dr. S.G. Soals forskning i telepati och framtidsförnimmelse.