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periodnatural historysciencepictorial workssmithsonian librariesacademy of natural sciences of philadelphiajournal of the academy of natural sciences of philadelphia ser.2:v.10 (1894-1896)journal of the academy of natural sciences of philadelphia ser.2:v.12 (1902-1904)journal of the academy of natural sciences of philadelphia ser.2:v.6 (1866-1869)journal of the academy of natural sciences of philadelphia ser.2:v.8 (1874-1881)
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