The anaglyph images require a red(left)/blue(right) viewer. The multiple images require a 3D print viewer. Both types of viewers may be obtained from sources on the internet. A couple of sources that have both are Reel 3-D Enterprises, Inc or Berezin Stereo Photography Products.
Images with three panels are arranged so that the center and left image use parallel viewing (or printing to be viewed with a stereoscope) and the center and right image use crossed-eye viewing. See some of the sites on the following links pages for tips on 3D viewing techniques and more images.