TY - JOUR AU - D. Hils AU - M. McCusker AU - H. Kleinpoppen AU - S. Smith BT - Physical Review Letters DA - Jan-08-1972 DO - 10.1103/PhysRevLett.29.398 PY - 1972 SP - 398 EP - 401 T2 - Physical Review Letters TI - Differential and Direct Differential Elastic Scattering Cross Sections for Electrons and Potassium Atoms VL - 29 SN - 0031-9007 ER -