"Sky catalogue 2000.0, Vol.2: Double stars,variable stars and nonstellar objects"
HIRSHFELD(Alan) & SINNOTT(Roger W)
"Sky catalogue 2000.0, Vol.2: Double stars,variable stars and nonstellar objects" - Cambridge Cambridge University Press 1985 - lvii p. + 385
"Sky catalogue 2000.0, Vol.2: Double stars,variable stars and nonstellar objects" - Cambridge Cambridge University Press 1985 - lvii p. + 385