An updated measurement of the atmospheric nu(mu)/nu(e) ratio-of-ratios, 0.6
8 +/- 0.11 +/- 0.06, has been obtained using a 4.6-kty exposure of the Soud
an-2 iron tracking calorimeter detector. The L/E distributions have been an
alyzed for effects of nu(mu) --> nu(x) oscillations, and an allowed region
in the Delta m(2) vs. sin(2)2 theta plane has been determined.