On: Anarchists in the Spanish Civil War (2002)

[coldtea]

Loads and loads of books, historical documents, documentaries , and so on on the matter.

Not just in Spain, in USSR and elsewhere too.

In fact the ideological enmity between communists and anarchists starts even back at the time of Bakhunin and Marx (and they were many critiques from one to another).

[dgarceran → coldtea]

Yes, in the first years of the Federación Regional: https://es.wikipedia.org/wiki/Federaci%C3%B3n_Regional_Espa%... in fact from their separation the socialist party (PSOE, the second most voted party in SPain nowadays) was created by Pablo Iglesias.