TY  - BOOK
AU  - Johnson, Wayne
TI  - Helicopter theory
SN  - 9780486682303
SN  - 94026727
U1  - 629.133352 JOH 
PY  - 1994///
CY  - Mineola, NY
PB  - Dover Publications
KW  - Helicopters
N1  - Includes bibliographical references and index
ER  -