...1,

Based on observations obtained with MegaPrime/MegaCam, a joint project of CFHT and CEA/DAPNIA, at the Canada-France-Hawaii Telescope (CFHT) which is operated by the National Research Council (NRC) of Canada, the Institute National des Sciences de l'Univers of the Centre National de la Recherche Scientifique of France, and the University of Hawaii.

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... DIRECT

http://cfa-www.harvard.edu/~kstanek/DIRECT/

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... survey

http://www.astro.livjm.ac.uk/~dfb/M33/

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... LGGS

The Local Group Galaxy Survey,
http://www.lowell.edu/users/massey/lgsurvey/index.html

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