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| | Bibliography |
 | | Some houses, however, appear more consistently than others: Theatrum Orbis Terrarum (Nico Israel; no longer active), The British Library, the University of Chicago Press, HES & DE GRAF, and Martino Publishing. |
 | | Their ongoing involvement is quite impressive, and one hopes to be continued. |
 | | This is an excellent reference, with over 600 annotated maps and charts that were published in English and foreign language books. |
| www.theprimemeridian.com /bibliography.htm (6267 words) |
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