Reprinted in Collected Scientific Papers by Wolfgang Pauli, ed. R. Kronig and V. F. Weisskopf, Interscience Publishers, John Willey and Sons, Inc. v.2 (1964) 911.
The Physical Review - the First Hundred Years, AIP Press (1995) CD-ROM.
Selected Papers on Quantum Electrodynamics, editor J. Schwinger, Dover Publications, Inc., New York (1958) 372.

Abstracts
In the following paper we conclude for the relativistically invariant wave equation for free particles: From postulate (I), according to which the energy must be positive, the necessity of Fermi-Dirac statistics for particles with arbitrary half-integral spin; from postulate (II), according to which observables on different space-time points with a space-like distance are commutable, the necessity of Einstein-Bose statistics for particles for arbitrary integral spin.

Related references More (earlier) information appears in W. Pauli and F. J. Belinfante, Physica 7 (1940) 177;
See also L. de Broglie, Compt. Ren. 209 (1939) 265;
M. Fierz, Helv. Phys. Acta 12 (1939) 3;
L. de Broglie, Compt. Ren. 208 (1939) 1697;
B. L. van der Waerden, Die gruppentheoretishe Methode in der Quantentheorie, Berlin (1932);
M. Fierz and W. Pauli, Proc. Roy. Soc. A173 (1939) 211;

Record comments
Theorem on the connection between spin and statistics.