TY - RPRT TI - Processing of Bulk YBa2Cu3O(7-x) High Temperature Superconductor Materials for Gravity Modification Experiments and Performance Under AC Levitation AU - Koczor, Ronald AU - Noever, David AU - Hiser, Robert PY - 1999 UR - https://ntrs.nasa.gov/citations/19990068007 ID - 19990068007 ER -