ELENCO DEI CAMBI 
XXI 
Svezia. 
Stockliolni. — Geologi ska fòreningen i Stockholm. 
Fòrhandlingar [bd. XII, 1890]. 
— K. Svenska Vetenskaps Akademien. 
Arkiv fòr Kemi, Mineralogi odi Geologi [bd. 2, 1905]. 
Arkiv fòr Zoologi [bd. 3, 1906J. 
Arkiv fòr Botanik [bd. 5, 1905]. 
Upsala. — Geological Institution of thè University of Upsala (Bi- 
bliothèque de l’Université R.). 
Bulletin | voi. I, 1892]. 
Svizzera. 
Zurich. — Naturforschende Gesellschaft. 
Vierteljahrssehrift [anno LY, 1910]. 
Africa. 
Cape Town. — Geological Survey. 
Annual report [1°, 1896]. 
Johannesburg. — Geological Society of South Africa. 
Transactions [voi. VI, 1904]. 
Proceedings [anno 1905]. 
America. 
Baltimore (U. S. A.). — Maryland Geological Survey. 
Reports [voi. I, 1897). 
Berkeley, California (U. S. A.). — Department University of Cali¬ 
fornia. 
Bulletin of thè department of Geology [voi. 5, 4906]. 
Buenos-Aires (R. Argentina). — Instituto geografico Argentino. 
Boleti» [t. X, 1889]. 
— Ministerio de Agricultura. División de Minas, Geologia é 
Hidrologia. 
Anales [t. IV, 1910]. 
