The main melody here, played in thirds by trumpets and violins, is meant to evoke:

I beleive the answer is: Homage to Lorca

The composition of homage to lorca is being done with  three movements:

 Baile (Dance): Lento (quasi recitativo)
–Allegro (  = 200)–Lento (quasi recitativo)
Duelo (Affliction):  = 96Son:  = 104–112

And the final movement would be  imposed by  several ostinatos, a device Revueltas uses for the Oeuvre

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