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Dear Mr. Mouat,
Thank you for posting your request on History Hub!
We searched WorldCat and located numerous entries for the International Cable Directory of the World and International Cable Register of the World, which include information for New York. You may use WorldCat to determine which libraries near you may have a copy of this directory, or you may prefer to search online for digitized copies of the directories.
We hope this information is helpful. Best of luck with your research!