| A 1.68:1037/2 | National Forest Vacations |
| D 103.2:R 24/6/996 | Lake Red Rock: Iowa's Largest Lake |
| I 19.2:W 27/7/CD | A Topographic Field Trip of Washington, D.C. (interactive multimedia) |
| I 29.2:R 26/4 | National Registry of Natural Landmarks, 1989 |
| I 29.2:R 59/2 | 1998 Rocky Mountain National Park Seasonal Handbook |
| I 29.2:T 68/5 | Register of National Recreation Trails |
| I 29.2:W 27/7 | Washington, D.C. |
| I 29.9/2: P 21/995 | The National Parks: Lesser-known Areas |
| I 29.9/5: 102 | Washington, D.C. |
| I 29.9/5: 104 | Wind Cave |
| I 29.9/5: 107 | Agate Fossil Beds |
| I 29.9/5: 108 | Petrified Forests of Yellowstone |
| I 29.9/5: 112 | Great Smoky Mountains |
| I 29.9/5: 122 | Grand Teton |
| I 29.9/5: 123 | Glacier Bay |
| I 29.9/5: 125 | At Home in the Smokies |
| I 29.9/5: 132 | Custer Battlefield |
| I 29.9/5: 145 | Sequoia and Kings Canyon |
| I 29.9/5: 149 | Castillo de San Marcos |
| I 29.9/5: 153 | Jefferson Memorial |
| I 29.9/5: 154 | Redwood |
| I 29.58/3: M 82 | Historic Resource Study: Mormon Pioneer National Historic Trail |
| I 29.103: 999-2001 | National Parks: Index 1999-2001 |
| I 29.130: 989-90 | Report on America's National Scenic, National Historic and National Recreation Trails |
| I 53.2: C 71/4 | Colorado BLM River Adventures |
| I 53.2:UP 6/4 | Floating the Upper Missouri |
| I 53.2:UT 1/6 | Utah: Wilderness Inventory 1999 |
| I 53.7/2:B 14 | Badlands: Interpretive Trail |