Robertson, Alec

Robertson, Alec (ed.) 1963. The Pelican History of Music.  Middlesex.

Reaney, Gilbert. 1960. Ars Nova in France. The Pelican History of Music, vol. 1: Ancient Forms to Polyphony, edited by Alec Robertson and Denis W. Stevens, 261-308. Harmondsworth, Middlesex, and Baltimore: Penguin Books.