EEnglish 1...P-QB4English 1...P-QB4de John Leonard WatsonEdiciones (1)English 1...P-QB4 (1982)B.T. Batsford, Ltd. · ISBN 9780713426885Más obras de John Leonard WatsonA Strategic Chess Opening Repertoire For WhiteSurvive & beat annoying chess openingsMastering the chess openings