Pandey, G; Kameswara Rao, N; Lambert, D. L; Jeffery, C. S; Asplund, M
(Astronomical Society of India, 2000)
High resolution spectra were obtained for a sample of hydrogen-deficient stars which are hotter than the R CrB stars and cooler among the extreme helium stars (EHe). We believe that these stars are transition objects ...