 Matthews and Foreman, authors of "Luftwaffe Aces — Biographies and Victory Claims", researched the German Federal Archives and found records for 102 aerial victory claims, plus five further unconfirmed claims.All of his victories were claimed on the Western Front and include 27 four-engined bombers.Victory claims were logged to a map-reference (PQ = "Planquadrat"), for example "PQ 14 West 3853".