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                                    Bir, S. S. and S. C. Verma: Chromosome Atlas of the Indian Pteridophytes (1951 - 2009). An index to chromosome numbers of ferns  and fern - allies of the present - day political India, with information about the related taxa from adjacent regions of Pakistan,  Nepal and Bhutan. 2010. 346 p. 4to. Hardcover. (99311)                  104.86
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