Euler, LeonhardEhler, Karl Leonhard Gottlieb, adressaatKayserling, L. B., adressaat2008-01-312008-01-311740-05-10F 3,Mrg CCCLIVa,Ep.phil.II,l.116-117http://hdl.handle.net/10062/5555LetterBriefKiriKiri K. L. G. Ehler 'ile, Petropoli