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m) Nord-, Sikl- und Zentral-Amer'ika. 



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 Chicago. University of Chicago, Botanical Gazette 1903 vol. XXXVI No. 5; 



1904 vol. XXXVII No. 4-6; XXX VKI No. 1-4. 

 Cincinnati. Society of Natural History, Journal vol. XX, No. 4. 

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 Colorado. University of Colorado, Studios vol. I No. 4; vol. II No. 1—2. 

 Colorado Springs. Colorado College Studies vol. XI— XII. 

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X No. 69-73. 

 Des Moines. Iowa Geological Survey, Annual Report 1902 vol. XIII. 

 Indianapolis. Indiana Academy of Sciences, Proceedings 1902. 

 Lancaster. American Mathematical Society, Bulletin 2 series, vol. X 



No. 4-10 and Register 1904; XI No. 1-2; General Index 1891-1904. 

 Lawrence. Kansas University, Quarterly Bulletin vol. IV, No. 6, 8. 

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 Mexico. Sociedad scientilica „ Antonio xVlzate", Meraorias y Revista, tomo XVIII 



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