21-cm line studies of spiral galaxies. II. The distribution and kinematics of neutral hydrogen in spiral galaxies of various morphological types.

210 Pb activities in and fluxes to sediments of the Washington continental slope and shelf

210 Pb and 137 Cs chronology of sediments from small, shallow Arctic lakes

210Pb sediment radiochronology: An integrated formulation and classification of dating models

210Pb-derived history of PAH and PCB accumulation in sediments of a tropical inner lagoon (Las Matas, Gulf of Mexico) near a major oil refinery

210Pb/226Ra and 210Po/210Pb disequilibria in seawater and suspended particulate matter

21cm Experiments for Reionization and the Dark Ages: Plans and Progress

21st century propulsion - Key issues and some answers

21st century runoff sensitivities of major global river basins

226Ra in the Black Sea and Sea of Marmara

230Th in the Andaman Sea: Rapid deep-sea renewal

230Th, 226Ra and 222Rn in abyssal sediments

230Th-238U disequilibrium systematics in oceanic tholeiites from 21°N on the East Pacific Rise

234Th deficit and excess in the Southern Ocean during spring 2001: Particle export and remineralization

234U/238U activity ratios of dissolved uranium in groundwaters from a jurassic limestone aquifer in England

235U fission tracks and 238U-series disequilibria as a means to study recent mobilization of uranium in Archaean pyritic conglomerates

238U-230Th-226Ra disequilibria in young Mount St. Helens rocks: time constraint for magma formation and crystallization

238U-Series in Fe Oxy/Hydroxides by LA-MC-ICP-MS, New Insights Into Weathering Geochronology

244 Pu Fission Track Thermometry and its Application to Stony Meteorites

250-MHz correlation using high-performance reconfigurable computing engines