Dude good research includes more than one source. And more than a fragment of a sentence.
Nothing I have said really requires a source. The things I said about the 152 comes from Focke-Wulf Ta-152 by Thomas Hitchcock. The things I said about poorly trained Luft pilots toward the end of the war is really common knowledge around these parts. I could cite a bunch of different sources for that tid bit.
And I own one of Mellingers books I don't have to search google books if I want to cite it.
In this thread I have provided you with 2 references. One by David John Hodgkinson, and one by George Mellinger. Both have written books on WW2 aircraft. Both are considered experts on the subject.
How many references would like?
So far the only evidence anyone has provided is how they've seen pictures of spitfires taking off from grass fields therefore they must be able to take off from rough fields... thats not very convincing.