TY  - BOOK
AU  - El'Yasberg,P E
TI  - DEPENDENCE OF SECULAR VARIATIONS OF ORBIT ELEMENTS ON THE AIR RESISTANCE
U1  - NASA 
PY  - 1961///
CY  - 
PB  - Nasa, Washington, D.C.
N1  - Bound With Nasa Tt F-41-50
ER  -