1. Pólya Plot  
   Eric W. Weisstein, MathWorld, Wolfram Research Inc,Champaign IL
2. A Toy Vector Field Based on Geometric Algebra  
   Shoeb Binderwala; Alyn Rockwood, Math. and Computer Sciences, Colorado School of Mines, Golden, CO
3. The Polya vector field  
   Paul Fishback, Math. Dept., Grand Valley State University, Allendale, MI  
4. The Polya Vector Field  PDF  
   Lindsey Alt and Lindsey Franchino, Math. Dept., Grand Valley State University, Allendale, MI  
5. The Polya Vector Field II  PDF  
   Jacqueline Burm and Amanda Peterson, Math. Dept., Grand Valley State University, Allendale, MI  
6. Interpreting the Contour Integral  PDF  
   Paul Fishback, Math. Dept., Grand Valley State University, Allendale, MI  
7. PlotPolyaField
   Wolfram Res., Inc., Champaign, IL  
8. Interactive Visualization in Complex Analysis  PDF  
   Matthias Kawski, Math. Dept., Arizona State University, Tempe, AZ  
9. The Pólya Vector Field PDF  
   Tristan Needham, Math. Dept., University of San Francisco, CA  
10. Polya Vector Field PDF  
    Johnny E. Brown, Math. Dept., Purdue University, West Lafayette, IN  

(c) John H. Mathews 2006