Anisotropy Superconductors ALLOY SYSTEMS ANISOTROPIA Alloy systems Anomalous Behavior of Hc3/Hc2 near Tc for Sn-In and In-Bi Alloy Systems Anomalous behavior of Hc3/Hc2 near Tc for Sn-In and In-Bi alloys systems CONDUCTIVIDAD ELECTRICA ELECTROMAGNETISMO Electric conductivity Electromagnetic properties FOILS Ginzburg-LandauTheory INDIUM SISTEMAS DE ALEACION SUPERCONDUCTIVIDAD SUPERCONDUCTORES SUPERCONDUCTORES DE TIPO I Superconducting Parameters and Size Effects of Aluminum Films and Foils Superconductive Supercooling and Superheating of Small Cadmium Spheres: Size Effects Superconductivity TEORIA DE GINBZURG-LANDAU Temperature variations Type-I superconductors VARIACIONES Variation of the Ratio Hc3/Hc2 in the Immediate Vicinity of Tc