TY  - BOOK
AU  - Richter,Nikolaus B.
AU  - Beer,Arthur
TI  - The nature at comets
U1  - 523.6 
PY  - 1963///
CY  - London
PB  - Methuen
KW  - Comets
N1  - Original title : statistik and Physik der; Translation of: Statistik and Physik der; Includes bibliographical references and index
ER  -