Source Publication (e.g., journal title)
Online searching is often learned in school or through a brief workshop. However, two recent books on online searching can provide one with close to an expert training. Reva Basch's 'Secrets of the Super Searchers' and Mary Ellen Bates' 'The Online Deskbook' are two worthy releases on the subject.
Tenopir, Carol, "Learning from the Experts" (1997). School of Information Sciences -- Faculty Publications and Other Works.