page 311 (bottom):
WAS:
and when p=q=1/2,Var N_{u}(n) \approx (2^{-k}-(2k+3)2^{-2k})n...
IS :
and when p=q=1/2,Var N_{u}(n) \approx (3 \times 2^{-k}-(2k+3)2^{-2k})n...
Correction by Warren J. Ewens, 10/4/95.