In the long article published in RAF Air Power Review number 2 summer 2004 "To stop them on the beach: Luftwaffe operation against the allied land in Italy" written by Prof. James Scorum you can find quoted the monography written by general Paul Deichmann and the diary of W.von Richthofen as a copy from the family. You can download the article in pdf format from
www.raf.mod.uk
I hope this help.
Francesco Maria Lentini