I am currently reading Atkin and Li's paper on Twists of newforms and Atkin-Lehner pseudo eigenvalues and one of the references there is to Weisinger's thesis:

Weisinger J., Some results on classical Eisenstein series and modular forms over function fields. Harvard thesis. (1977)

Does anyone have a scan or digital copy of it? Or an alternative reference that treats Atkin-Lehner operators $W_Q$ acting on Eisenstein series? (I know how $W_N$ acts on level $N$ Eisenstein series)