"Directories Bibliography." . . . . . . "Mailing lists, A directory of"@en . . "Bibliography"@en . . "Bibliography" . . "A directory of mailing lists obtainable in book and pamphlet form telling where to get them and their cost"@en . . . "A directory of mailing lists obtainable in book and pamphlet form, telling where to get them and their cost" . "A directory of mailing lists obtainable in book and pamphlet form, telling where to get them and their cost"@en . . . . . "Directories." . .