Bf 110 claims in the Battle of Britain

[Peter Cook]

I am trying to understand why there are so few Battle of Britain claims by Bf 110 pilots included in the OKL claims listings of Wood, Balss, etc. For example, on 13 August the Luftflotte 3 Einzelmeldung lists claims by ZG 2 for '12 Hurricane and Spitfire' and for ZG 76 for '11 Hurricane and Spitfire'. But the only Bf 110 claims for this date that are listed in the Wood - O.K.L. Fighter Claims files are for: Oblt. Erhard Bremer - 5./ZG 76 - Spitfire and Fw. Max Leschnig - 5./ZG 76 - Spitfire. Balss repeats just these two claims. A few additional Bf 110 claims are listed in other sources, such as Mathews and Foreman's Luftwaffe Aces in their claims listings for individual pilots, but are there any other sources that might provide additional Bf 110 claim listings for the Battle of Britain period? I have the relevant John Vasco books, but these list losses, not claims.