Be very careful with anything that was written by bureaucrats inside the Beltway instead of the results of the research at Oak Ridge (this book). Much of what came from there will get you killed, as detailed in NWSS, e.g. through inadequate ventilation resulting in too great a heat buildup.

But your general point is well taken; get hardcopy today, and it's a very good idea to get the official NWSS book since the scaling from a copier or electronic printer will throw off the calibration of the Kerney Fallout Meter (a electroscope radiation meter that you make out of aluminum foil (for the electroscope leaves) and a can (plus desiccant and a few other odds and ends)).