Mathematical folklore has it that the famous algebraist Hans Rademacher once came up with a wrong disproof of the Riemann Hypothesis, which was initially believed by another famous mathematician, Carl Siegel. I vaguely remember that they say Rademacher's flaw was that he mistakenly assumed that logarithms of complex numbers are uni-valued. 

But where can i find this particular work of Rademacher ? I would want to go over it in detail and i imagine something could be learned from it. A Google search couldn't yield anything meaningful. Thanks in advance.