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- [28] The Stellar magnitude scales of the Astrographic catalogue. Twelfth note: The Hyderabad magnitudes (-19 degrees and-34 degrees), the Edinburgh magnitudes (-38 degrees), and the Cape magnitudes (-41 degrees and-42 degrees). MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1917, 78 (01) : 0579 - 0591
- [29] PHOTOELECTRIC PHOTOMETRY OF SELECTED AG STARS IN 25 DEGREES TO 30 DEGREES ZONE ASTRONOMICAL JOURNAL, 1968, 73 (03): : 187 - &
- [30] FRACTURE ZONE DISTRIBUTION ALONG MID-ATLANTIC RIDGE BETWEEN 29 DEGREES N AND 40 DEGREES N TRANSACTIONS-AMERICAN GEOPHYSICAL UNION, 1973, 54 (04): : 325 - 325