G.W. Leibniz ; edited, with an introduction by Austin Farrer ; translated by E.M. Huggard from C.J. Gerhardt's edition of the Collected philosophical works, 1875-90Open Court1985
by G.W. Leibniz ; [edited with an introduction by Austin Farrer ; translated by E.M. Huggard from C.J. Gerhardt's edition of the collected philosophical works, 1875-90]Routledge & K. Paul1951 [i.e. 1952]