Abstract
References
1.
Mulder
J.
Verdonk
G. J.
(1949 ) J. Path. Bact. , 61 , 55 .
2.
Farr
: in Registrar General of England and Wales (1852)Tenth Annual Report . H.M.S.O. , p. xxix .
3.
Logan
W. P. D.
MacKay
D. G.
(1951 ) Lancet (i), 284 .
4.Registrar General of England and Wales (1920 ) Supplement to the 81st Annual Report . H.M.S.O.
5.
Stocks
P.
(1935 ) Lancet (ii), 386 .