Erwin Clausen, 132 or 100 aerial-victories

[waterloo]

Hello,
I bought the 4 volumes from Red Kite-Verlag Luftwaffe Aces by Mathews / Foremann.
I noticed a significant difference to the previously published number of arial victories to Major Erwin Clausen.
In the literature accessible to me so far and in various Internet lists, Erwin Clausen has recorded 132 aerial victories.
In my newly acquired book series only 100 aerial victories.
Would like to hear the opinion from other specialists.
Otherwise I find the book series very good, an admirable work.

Best regards

Thomas