Yes, "National Geographic Magazine" is capitalized because it is the proper name of a specific publication.

National Geographic Channel - Canada - was created in 2001.

You can purchase magazine holders for National Geographic from www.levenger.com. They can also be purchased from Amazon or through the National Geographic magazine where you are likely to receive a discount if you are a subscription holder.

The National Geographic Society was founded on January 27, 1888. The National Geographic Magazine was first published nine months after the Society was founded as the Society's official journal.

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