| Call Number (LC) | Title | Results |
|---|---|---|
| I 29.21:C 38/2019 | Charles Young Buffalo Soldiers National Monument, Ohio | 1 |
| I 29.21:C 39/2016/SPANISH-ENGLISH | César E. Chávez National Monument, California | 1 |
| I 29.21:C 43/8/2019 | Chickamauga and Chattanooga : Chickamauga and Chattanooga National Military Park, Georgia/Tennessee | 1 |
| I 29.21:C 43/9/2020 | Chickasaw National Recreation Area, Oklahoma | 1 |
| I 29.21:C 44/2/2003 | Chiricahua Chiricahua National Monument, Arizona | 1 |
| I 29.21:C 71/12/998 | Jamestown : Colonial National Historical Park, Virginia : official map and guide | 1 |
| I 29.21:C 72/2/2017 | Colorado National Monument | 1 |
| I 29.21:C 72/5/2022 | Colorado National Monument | 1 |
| I 29.21:C 81/2017 | Coronado National Memorial, Arizona | 1 |
| I 29.21:C 83/2016 | Cowpens National Battlefield, South Carolina | 1 |
| I 29.21:C 85/2/2017 | Craters of the Moon National Monument and Preserve, Idaho | 1 |
| I 29.21:C 91/3/ | Multimedia presentations | 1 |
| I 29.21:C 96/5 | Information brochure for a native American memorial at Custer Battlefield National Monument | 1 |
| I 29.21:D 46/2017 | De Soto National Memorial, Florida | 1 |
| I 29.21:D 49/4/2022 | Devils Tower National Monument, Wyoming | 1 |
| I 29.21:D 49/8 | Devils Postpile National Monument, California : official map and guide | 1 |
| I 29.21:D 61/2/958 | The dinosaur quarry. Dinosaur National Monument, Colorado-Utah | 1 |
| I 29.21:D 61/3 | Dinosaur : learning about dinosaurs | 1 |
| I 29.21:D 61/4 | Dinosaur hiking trails | 2 |
| I 29.21:D 61/5 |
Dinosaur petroglyphs and pictographs Dinosaur : petroglyphs and pictographs |
2 |