00388nam a2200121Ia 4500082002000000100001700020245007400037260005000111300002800161490006700189500000500256700000500261  a515.73bW225.LC  aWalsh, J. L.  aThe locations of critical points of analytic and harmonic functionsb  aNew YorkbAmerican Mathematical Societyc1950  aviii, 384p. Bibl. Index  aAmerican Mathematical Society Colloquium Publications v v. 34  a  a