Abstract

References
1.
Adams
G L
Kivowitz
J
Ziskind
E
. (1970 ) Archives of General Psychistry
23 , 305 –309 .
2.
Batchelor
I R C
. (1964 ) Proceedings of the Royal Society of Medicine
57 , 417 –419 .
3.
Burger
P C
Vogel
F S
. (1973 ) American Journal of Pathology
73 , 457 –468 .
4.
Forssman
H
Wålinder
J
. (1969 ) Acta psychiatrica Scandinavica Supplement
207 , 34 –40 .
5.
Hayman
M
. (1939 ) Journal of Mental Science
85 , 1183 –1193 .
6.
Naylor
G J
Donald
J M
Le Poidevin
D
Reid
A H
. (1974 ) British Journal of Psychiatry
124 , 52 –57 .
7.
Naylor
G J
Reid
A H
Dick
D A T
Dick
E G
. (1976 ) British Journal of Psychiatry
128 , 169 –180 .
8.
Oliver
B E
. (1975 ) Journal of Mental Subnormality
21 , 115 –116 .
9.
Penrose
L S
. (1938 ) Special Report Series of the Medical Research Council (London) No. 229.
10.
Reid
A H
. (1971 ) MD Thesis, Dundee.
11.
(1972 ) British Journal of Psychiatry
120 , 205 –218 .
12.
Reid
A H
Aungle
P G
. (1974 ) Journal of Mental Deficiency Research
18 , 15 –23 .
13.
Reid
A H
Naylor
G J
. (1976 ) Journal of Mental Deficiency Research
20 , 67 –76 .
14.
Sykes
D P
. (1975 ) Journal of Mental Subnormality
21 , 3 –5 .
15.
Sylvester
P E
. (1974 ) Journal of Mental Deficiency Research
18 , 367 –376 .
16.
Veall
R M
. (1974 ) Journal of Mental Deficiency Research
18 , 99 –106 .
