A far-infrared study of the N/O abundance ratio in galactic H II regions
1988 ◽
Vol 67
(4)
◽
pp. 417-420
◽
1994 ◽
Vol 228
(4-5)
◽
pp. 410-416
◽
1982 ◽
Vol 78
(10)
◽
pp. 1649
◽
1994 ◽