Where to research the air side of the Bismarck operation

Where can a researcher find information on the air operation during the Bismarck campaign?

Victoria Taylor's recent German archival research is the strongest lead for an up-to-date answer.

Victoria Taylor is the strongest lead because her recent work in German archives is more current than information recalled from an older conference conversation. The broader research lesson is to follow the scholar closest to the primary sources when the evidence base is still developing.