interview help [urgent] Hello all, Coming week will go for an interview. I need to know some of the basic information of the following. 1. characterization and chemical analysis of cementititous materials, and engineering materials by XRD, SEM, XRF, etc. 2. Some details on Metal Structure Behaviour and Fatigue & Fracture. Please help me by giving some good websites, links, free online resources, etc related to the information above. Just basic would be enough. At present I have no access to books so give me only the websites. Thanks and regards, Rajini.