The King's Indian Defence - Leonard Barden - 1973 Hardback Chess Book

THE MODERN DEFENCE By R D Keene & G S Botterill 1976 HC/DJ Chess

The French Defence Main Line Winawer - John Moles - 1975 Hardback Chess Book

The Modern Defence George Botterill Vintage Chess Openings Book

THE PIRC DEFENCE - CONTEMPORARY CHESS OPENINGS by Botterill & Keene 1973 HC DJ

The Pirc defence (Contemporary chess openings)

New Ideas in the Pirc Defence - Nunn, John - Batsford

1975 Pirc Defence G. Friedstein Chess Book