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	1.	The geologic time classification of the United States Geological survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms. A compilation by M. Grace Wimarth. by Wilmarth, M. Grace (Mary Grace), 1866-1949 [comp.] Series: U. S. Geological survey. Bulletin ; 769 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Washington, Govt. print. off., 1925 Availability: No items available. Add to cart (remove)
	2.	Some graphs on the calculation of geological age, by Frans E. Wickman. With one plate. by Wickman, Frans E Series: Ser. C--Avhandlingar och uppsatser ; n:o 427. \| Årsbok (Sveriges geologiska undersökning) ; 33 : n:o 7. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Stockholm, Kungl. Boktryckeriet, P.A. Norstedt & Söner, 1939 Availability: No items available. Add to cart (remove)
	3.	A graph for the calculation of the age of minerals according to the lead method, by Frans E. Wickman. With one plate. by Wickman, Frans E Series: Ser. C--Avhandlingar och uppsatser ; n:o 458. \| Årsbok (Sveriges geologiska undersökning) ; 37 : n:o 7. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Stockholm, Kungl. boktryckeriet, P.A. Norstedt & söner, 1944 Availability: No items available. Add to cart (remove)
	4.	Isotopic age determinations of Nevada rocks / by John H. Schilling. by Schilling, John Harold, 1927- Series: Report (Nevada Bureau of Mines) ; 10. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Reno, Nev. : Mackay Schools [sic] of Mines, University of Nevada : For sale by the Nevada Bureau of Mines, University of Nevada, 1965 Availability: No items available. Add to cart (remove)

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