Statute-making in the English church in the thirteenth century / C.R. Cheney. - Cheney, Christopher Robert, 1906- (OLS)http://pul/name/6979 (Clarendon, 1973)

From Frege to Gödel : a source book in mathematical logic, 1879-1931 / Jean van Heijenoort. - Heijenoort, Jean van. (OLS)http://pul/name/54420 (Harvard University Press, 1967)
Include indice.
Bibliografia in nota.