• 3 Books
• 1 Journals, Magazines, Newspapers

• 3 National parks and reserves
• 1 National monuments
• 1 Outdoor recreation
• 1 Wilderness areas

• 4 United States. National Park Service

• 4 English

• 1 Cabrillo National Monument
• 1 Cabrillo National Monument (San Diego, Calif.)
• 1 Joshua Tree National Park
• 1 Joshua Tree National Park (Calif.)
• 1 San Diego
• 1 Santa Monica Mountains National Recreation Area
• 1 Santa Monica Mountains National Recreation Area (Calif.)
• 1 Sequoia-Kings Canyon Wilderness (Calif.)

Limit year range