U-series isotope systematics of mafic magmas from central Oregon: Implications for fluid involvement and melting processes in the Cascade arc

U-Th fractionation by fluids in K-rich magma genesis: the Vico volcano, Central Italy

U-Th isotopic systematics at 13°N east Pacific Ridge segment

U-Th-Pb in chondrites - Evidence of elemental mobilities and the singularity of primordial PB

U-Th-Pb measurements of Luna 20 soil

U-Th-Ra radioactive disequilibria and magmatic processes

U-Th/He age of phenocrystic garnet from the 79 AD eruption of Mt. Vesuvius

U. S.-European Cooperation in Space Science: A 25-Year Perspective

U.S. ground-based space research programs in Svalbard (Norway)

U.S. Naval Observatory Zodiacal Zone Catalog (ZZCAT; USNO 1990)

U.S. Vision for Space Exploration: Who Benefits?

U/Th dating by SHRIMP RG ion-microprobe mass spectrometry using single ion-exchange beads

Über den transport von Wolfram und den Absatz von Wolfram-Doppel-Oxiden in fluiden wässrigen Lösungen

Über die in Kristallen eingeschlossenen Flüssigkeiten und Gase

Ubiquitous high-FeO silicates in enstatite chondrites

Ubiquitous Suprathermal Tails on the Solar Wind and Pickup Ion Distributions

Ubiquity and dominance of oxygenated species in organic aerosols in anthropogenically-influenced Northern Hemisphere midlatitudes

Ubiquity of hydrocarbons in nature: Aliphatic hydrocarbons in weathered limestone

UBV CCD Photometry of the LMC Double Cluster NGC 1850

UBV magnitude of NGC 884 B-type pulsators (Krzesinski+ 1997)