TY - RPRT TI - Tape-controlled gradient elution chromatography system for steroid analysis. AU - D F Johnson AU - N S Lamontagne AU - G C Riggle AU - F O Anderson PY - 1971 DO - 10.1021/ac60306a045 UR - https://pubmed.ncbi.nlm.nih.gov/5130422/ ID - 5130422 ER -