by Ted Cushman This month, JLC introduces a new column to present information sources for contractors. From books to videos to the electronic world of CD-ROMs and World Wide Web sites, we'll acquaint you with the best of what's out there. Topping the bill this month are two handbooks on plumbing from Taunton Press. Authored by veteran plumber Peter Hemp, Plumbing a House and Installing and Repairing Plumbing Fixtures offer a good refresher course for pros and a great introduction for anyone just starting out. The first volume covers rough plumbing, while the second focuses on finish installations. Rough-in for rookies. Plumbing a House starts out with basic chapters on tools and materials, then moves into a thorough discussion of