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- *Many books and on-line documentation resources available (for the language and its lib16 KB (2,491 words) - 04:54, 21 February 2018
- ...images of M87. Compare them with various types of galaxies illustrated in books and on the web. Try to see how this galaxy fits in the [http://en.wikipedia19 KB (3,387 words) - 14:12, 5 April 2016