This archive contains TIFF (.tif) files. I had the problem that most image viewers only display the first page. This can be solved by using tiffsplit (tiff in /usr/pkg/src/graphics). An other way can be using display or convert (from ImageMagick in /usr/pkg/src/graphics). But they both want to use more memory than I have available (1 GB RAM + 32 GB swap). Bummer. Maybe you have more luck.
If you're running KDE, you can use kview (slow) or kfax (fast).