TY  - BOOK
AU  - Johnson, Wayne
TI  - Helicopter theory
SN  - 0-486-68230-7
CY  - New York
KW  - Aircraft
KW  - Automobile Engineering
KW  - Helicopters -- Rotating wings
KW  - Mechanical Engineering
KW  - Propulsion and control
KW  - Rotary wing dynamics
N1  - Includes bibliographical references and index
ER  -