TY  - BOOK
AU  - Gathier, Roelof
TI  - Study of planetary nebulae: distances & physical properties
PY  - 1984///
CY  - Groningen
PB  - Drukkerij Dijkstra Niemeyer, 
KW  - Nebulae
KW  - Planets
KW  - Thesis
KW  - Foreign
ER  -