TY  - BOOK
AU  - Hulst , H C van de 
TI  - Space research II : proceedings of the second International Space Science Symposium, Florence, April 10-14 1961, organized by the Committee on Space Research - COSPAR and Consiglio nazionale delle ricerche
U1  - 500.5 20
PY  - 1961///
CY  - Amsterdam :  
PB  - North-Holland
ER  -