French poisoned pawn a study of the Sally 1-g4 g7, French Defense (Nimzowitzsch Defense) - Zeuthen, Steffen; Jarlnaes, Erik. (Mandaluyong, Rizal Cacho Hermanos, 1971)
Reprint of the same ed. published by Zeuss Transactions, Copenhagen.
"Reprinted under authority of Presidential Decree No. 285 as amended by P.D. No. 400."
Keywords: Chess -- Openings