Abstract

References
1.
Allison
A C
. (1965 ) In: Comparative Physiology and Pathology of the Skin . Ed.
Rook
A J
Walton
G S
. Oxford ; p 665 .
2.
Allison
A C
. (1966 ) J. nat. Cancer Inst.
36 , 869 .
3.
Allison
A C
. (1969 ) Proc. roy. Soc. Med.
62 , 956 .
4.
Andrewes
C H
(1959 ) Acta Un. int. Cancr.
15 , 760 .
5.
Churchill
A E
Biggs
P M
. (1967 ) Nature (Lond.)
215 , 528 .
6.
Churchill
A E
Payne
L N
Chubb
R C
. (1969 ) Nature (Lond.)
221 , 744 .
7.
Epstein
M A
(1965 ) Wistar Inst. Symp. Monogr.
4 , 69 .
8.
Grace
J T
Jr
Mirand
E A
. (1963 ) Ann. N. Y. Acad. Sci.
108 , 1123 .
9.
Granoff
A
Cane
P E
Rafferty
K A
Jr
(1965 ) Ann. N. Y. Acad. Sci.
126 , 237 .
10.
Hellström
I
Hellström
K E
Evans
C H
Heppner
G H
Pierce
G E
Yang
J P S
. (1969 ) Proc. nat. Acad. Sci. (Wash.)
62 , 362 .
11.
Hellström
I
Hellström
K E
Pierce
G E
Bill
A H
. (1968 ) Proc. nat. Acad. Sci. (Wash.)
60 , 1231 .
12.
Hellström
I
Hellström
K E
Pierce
G E
Yang
J P S
. (1968 ) Nature (Lond.)
220 , 1352 .
13.
Henle
G
Henle
W
Diehl
V
. (1968 ) Proc. nat. Acad. Sci. (Wash.)
59 , 94 .
14.
Henle
W
(1967 ) Science
157 , 1064 .
15.
McKhann
C F
. (1969 ) Transplantation
8 , 209 .
16.
Meléndez
L V
(1969 ) Laboratory Primate Newsletter
8 , 1 .
17.
Morton
D A
Malmgren
R A
. (1968 ) Science
162 , 1279 .
18.
Rawls
W E
(1968 ) Science
161 , 1255 .
19.
Rous
P
Beard
J W
. (1938 ) J. exp. Med.
62 , 523 .
20.
Rowson
K E K
Mahy
B W J
. (1967 ) Bact. Rev.
31 , 110 .
21.
Spencer
E S
. (1969 ) Lancet
i , 777 .
22.
Svoboda
J
. (1968 ) Symp. Soc. gen. Microbiol.
18 , 249 .
23.
Tyrrell
D A J
Bynoe
M J
Hoorn
B
. (1968 ) Brit. med. J.
i , 606 .
24.
Warren
J
. (1965 ) In: Rivers' Viral and Rickettsial Infection of Man . 4th ed . Ed.
Horsfall
F L
Tamm
I
. London & Philadelphia ; p 1169 .
