I was able to borrow a copy of 'The Legion Condor' by Ries and Ring over the weekend. Within the narrative of the book, I counted 16 bf109s that were destroyed or crash landing after damage sustained in air combat with 3 KIA. Quite low losses for claiming over 300 victories. Of course, there was substantial over claiming. While Maslov gives 120 I-16s lost in air combat, the Germans alone received credit for 170.