The Pirc defence - Botterill, G. S.; Keene, Raymond D. (Mandaluyong, Rizal Cacho Hermanos, 1973)
"Reprinted under authority of Presidential Decree No. 285 as amended by P.D. No. 400."
Reprint of the same ed. published by Batsford, London.
Keywords: Pirc, Vasja -- 1907-.; Chess -- Openings