Hi,
a new book announces about it in Le Fana 4/2017,called La SPCA,Société Provençale de Constructions
Aéronautiques,La Ciotat-Marseille,1925-1936.
A 400 pages and price 30 Euro.
http://memoireshydraviation.over-blog.com/2017/01/livre-sur-la-spca.html