by Harvey, Chris A., Carter, J. Chance, Ertel, John R., Alviso, Cindy T., Chinn, Sarah C., Maxwell, Robert S.
Published in Journal of Chromatography A (03.07.2015)

by Hedges, John I, Ertel, John R
Published in Analytical chemistry (Washington) (01.02.1982)

by Hedges, John I., Ertel, John R., Quay, Paul D., Grootes, Pieter M., Richey, Jeffrey E., Devol, Allan H., Farwell, George W., Schmidt, Fred W., Salati, Eneas
Published in Science (American Association for the Advancement of Science) (07.03.1986)

by Ertel, J.R, Hedges, J.I
Published in Science (American Association for the Advancement of Science) (03.02.1984)

by Leopold, E.B, Nickmann, R, Hedges, J.L, Ertel, J.R
Published in Science (American Association for the Advancement of Science) (24.12.1982)

by Wakeham, Stuart G., Ertel, John R.
Published in Organic geochemistry (1988)

by Fiddler, W, Doerr, R.C, Ertel, J.R, Wasserman, A.E
Published in Journal of the Association of Official Analytical Chemists (01.09.1971)

by JR. JOHN C. ERTEL
Year of Publication 22.09.1936

by JR. JOHN C. ERTEL
Year of Publication 22.12.1931