R. W. Frel

Trace Metal Enrichment on Chemically Modified Filter Papers

W. Haerdi, H. Linder, B. Schreiber, 1977 .

Extraction detector for high-performance liquid chromatography using solvent segmentation of the column effluent

J. F. Lawrence, U. Brinkman, R. W. Frel, 1979 .

The chromatographic properties of transition metal complexes of pyridine-2-aldehyde-2-quinolylhydrazone

D. E. Ryan, C. A. Stockton, R. W. Frel, 1968 .