TY - JOUR AU - John Ekin AU - K Salama AU - V Selvamanickam C2 - Nature DA - 1991-01-01 00:01:00 LA - en M1 - 350 PB - Nature PY - 1991 TI - High Transport Current Density in Bulk YBa2Cu3O7 at Liquid Nitrogen Temperature in Magnetic Fields up to 30 T ER -