Google Books 10 Ağustos 2021 tarihinde Wayback Machine sitesinde arşivlendi. 1915 Annual report of the corporation of the Chamber of Commerce of the State of New York
Google Books New York supplement, Volume 98 By West Publishing Company
751,188 Google Books 10 Ağustos 2021 tarihinde Wayback Machine sitesinde arşivlendi. page ccvi, ccviii Proceedings of the annual meeting, Volume 21 By American Gas Light Association
Google Books 10 Ağustos 2021 tarihinde Wayback Machine sitesinde arşivlendi. 1915 Annual report of the corporation of the Chamber of Commerce of the State of New York
751,188 Google Books 10 Ağustos 2021 tarihinde Wayback Machine sitesinde arşivlendi. page ccvi, ccviii Proceedings of the annual meeting, Volume 21 By American Gas Light Association