Aller, L. H. (1969). A comparison of radio-frequency and optical studies of selected planetary nebulae. University of California.
Chicago-Zitierstil (17. Ausg.)Aller, Lawrence Hugh. A Comparison of Radio-frequency and Optical Studies of Selected Planetary Nebulae. Los Angeles: University of California, 1969.
MLA-Zitierstil (9. Ausg.)Aller, Lawrence Hugh. A Comparison of Radio-frequency and Optical Studies of Selected Planetary Nebulae. University of California, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.