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• At the Earth's Core - Review of ERB's At the Earth's Core from a current perspective.
• At the Earth's Core - Plain text version at Project Gutenberg.
• OFCN Bookshelf: At The Earth's Core - Chapter-indexed HTML text of the work.
• Page By Page Books: At the Earth's Core - Chapter-indexed and paged HTML text of the novel.
• Pellucidar - Online guide to ERB's novels of Pelucidar.
• Pellucidar - E-text at Project Gutenberg.

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