How To Build Air Raid Shelters

Apart from helpfully citing the municipal archive (Arxiu
Administratiu) where he had found the information about civil
defence, Estanislau Roca also published the cover of this little
manual, a copy of which I found soon after in a second-hand
book shop.

DIY instructions on how to build your own collective air raid shelter.

Two things are significant:

First: the excellent publication was issued by the Department of
Urban Planning and Public Works, in the able hands of the Anarcho-
Syndicalist Trades Union, the CNT.

Second: the date of publication is May 1937.