Volumes of production of dirhams in al-Andalus during the years A. H. 330 and A. H. 340 as calculated from die-link statistics - Canto García, Alberto (Problems of medieval coinage in the Iberian area : a symposium held by the Sociedade Numismática Scalabitana and the Instituto de Sintra on 4-8 october, 1988 ; 3rd Symposium on Problems of Medieval Coinage in the Iberian Area, 1988)