Maleme, Crete, 20-05-1941, DFS 230 + JU 52

Hi chaps,
I try go through first fighting hours during 20-05-1941 at Maleme airfield.
I have two basic questions concerning DFS 230 gliders (69 pcs) and towing JU 52/3mg7/8e aircraft:
1) Which staffels/units did this towing for DFS 230 gliders, perhaps by JU 52? KGrzbV 40/105/106 or somebody else e.g. LLG 1 itself? From Tanagra not from Topolia? What were the Geshwader codes of these units, perhaps 9P/G6/4V/H4/1Z? I have read some basic bibliography as:
1] Battle Orders / German Airborne Divisions / Osprey no 4 / Bruce Querrie
2] Lufwaffe Codes, Markings & Units 1039-1945 / Schiffer / Barry C. Rosch
3] Air War for Yugoslavia Greece and Crete 1940-41 / Grub Street / Christopher Shores
2) I have not found any code letters (H4/LA/LB+1-91 etc.) of DFS 230 gliders from the couple of photos around Maleme. One reason can be that they were censored from the photos, but I do not believe in this. Perhaps there were no codes at all?
BR, Risto