1
Published: 2001
Superior document: Abhandlungen aus der Hamburger Sternwarte 12
2
Published: 2001
Superior document: Catalogue of galactic planetary nebulae Part 1
3
Catalogue of galactic planetary nebulae / Part 2 : Charts / L. Kohoutek. - Technical collab. D. Kühl
Published: 2001
Superior document: Catalogue of galactic planetary nebulae Part 2