Helicoprion. : Resurrecting the shark : a scientific obsession and the mavericks who solved the mystery of a 270-million-year-old fossil / Susan Ewing.
Helicopters -- Design and construction -- Juvenile literature. : The science of flight : the air-amazing truth about planes and helicopters / written by Ian Graham ; artists, Christos Skaltsas, Bryan Beach, Jared Green, Sam Bridges, and Shutterstock.
Helicopters -- Drawings -- Juvenile fiction -- Videodiscs. : Drawing with Mark. Take flight! As the wheels turn [(DVD) videorecording] / produced and directed by Robert Palmer for Big City Publishing, LLC ; executive producer Jacqui Fishman.
Helicopters in art -- Juvenile literature. : Learn to draw planes, choppers & watercraft : learn to draw 22 different subjects, step by easy step, shape by simple shape! / illustrated by Tom LaPadula.
Helicopters in search and rescue operations -- Videodiscs. : Straight up [(DVD) videorecording] : helicopters in action / a film for the Smithsonian Institution's National Air and Space Museum ; produced by SK Films Inc. ; producers, Jonathan Barker & Diane Roberts ; writers, David Douglas & Carl Knutson ; director and photographer, David Douglas.
Helicopters -- Videodiscs. : Straight up [(DVD) videorecording] : helicopters in action / a film for the Smithsonian Institution's National Air and Space Museum ; produced by SK Films Inc. ; producers, Jonathan Barker & Diane Roberts ; writers, David Douglas & Carl Knutson ; director and photographer, David Douglas.