词组短语
权威例句
Perpetual Improvement: A Potomac Environmental Story.Lauraceous Flowers from the Potomac Group (Mid-Cretaceous) of Eastern North AmericaNutrient exchange across the sediment-water interface in the Potomac River estuaryPollen and leaves from the mid-Cretaceous Potomac Group and their bearing on early angiosperm evolutionCuticle Evolution in Early Cretaceous Angiosperms From the Potomac Group of Virginia and MarylandThe effect of the Asiatic clam, Corbicula fluminea, on phytoplankton of the Potomac River, MarylandANGIOSPERM FLOWERS AND TRICOLPATE POLLEN OF BUXACEOUS AFFINITY FROM THE POTOMAC GROUP (MID〤RETACEOUS) OF EASTERN NORTH AMERICAAvailability of ferric iron for microbial reduction in bottom sediments of the freshwater tidal potomac riverVirginianthus calycanthoides gen. et sp. nov.-A Calycanthaceous Flower from the Potomac Group (Early Cretaceous) of Eastern North Am...Early Cretaceous (Early to Middle Albian) Platanoid Inflorescences Associated with Sapindopsis Leaves from the Potomac Group of East...