"A further study of the H and K lines of calcium."
1909 · Offprint from:
by KING, Arthur S.
Offprint from:: Astrophysical Journal, Vol. XXIX, 1909., 1909. Series: Contributions from the Mount Wilson Solar Observatory, No. 38. 254 x 172 mm. 8vo. 9 pp. 2 plates. Printed wrappers. Fine. (Inventory #: S3736)