TY  - GEN
AU  - Gelb,Sc.D
TI  - Multiple-input Describing Functions and nonliner system design
U1  - 517.382 
PY  - 1968///
CY  - New York
PB  - Mc Graw Hall Book Company
KW  - Multiple-input Describing Functions
N1  - Includes bibliographical references and index
ER  -