TY - RPRT TI - Dual-field and flow-programmed lift hyperlayer field-flow fractionation. AU - S K Ratanathanawongs AU - J C Giddings PY - 1992 DO - 10.1021/ac00025a003 UR - https://pubmed.ncbi.nlm.nih.gov/1736679/ ID - 1736679 ER -