Brosch.34 

F'ront-1ine.-Is;sued for tLe ~,~il1istry of 
Horne Secl1 rity by tbe 1dnistry of Informc.tiOD. 
Front Line 1940-41. The officiDl story 
cf tlie civil d efence of Bri.tain. [11111 s tr. J 
-Landon: H.hl.Stationery Off. 1942. 157 S. 
80