The Isotopic Composition of Lead from ST. Helelna and Ascension Islands

Uber Suturen nautiliconer Nautiloidea ( Cephalopoda )

/ Tobien, Heinz

Mineralogical Studies of the Uranium Vein Type Together with Sulphide Pargenses in Iran

Alaskas good friday earthquake, march 27, 1964

/ Arthur Grantz, George Plafker, and Revben Kachadoorian

Note on Zircons from the Witwatersrand Conglomerates