Incoming Resources
- Helicopters, by Darlene Stille
- Helicopters on the move, Jeffrey Zuehlke
- Helicopters, by Jenny Fretland VanVoorst
- Rescue helicopters in action, by Becky Olien
- Straight up, helicopters in action, a film for the Smithsonian Institution's National Air and Space Museum ; produced by Sky films, Inc. ; producers, Jonathan Barker, Diane Roberts ; writers, David Douglas, Carl Knutson ; director and photographer, David Douglas
- Helicopters, by Martha E.H. Rustad
- Helicopters, by Rebecca Pettiford
- Helicopters, by Mari Schuh
- How does a helicopter work?, by Sarah Eason
- Helicopters on the go, Beth Bence Reinke