by Katz, S E, Helrich, K
Published in Residue reviews (1964)

by Malone, C R, Winnett, A G, Helrich, K
Published in Bulletin of environmental contamination and toxicology (01.03.1967)

by WELLS, J. R., HELFRICH, K. R.
Published in Journal of fluid mechanics (25.06.2001)

by Helrich K, Burke J.A, Malanoski A.J, Puma B.J, Butler S.W
Published in Journal of the Association of Official Analytical Chemists (01.01.1981)

by Carey, W.F, Helrich, K
Published in Ass Offic Anal Chem J (1970)

by Siewierski, M, Helrich, K
Published in Ass Offic Anal Chem J (1970)

by Helrich, K, Race, S, Reed, J
Published in Bull Environ Contamination Toxicol (1970)

by Hermanson, H.P, Siewierski, M, Helrich, K
Published in Ass Offic Anal Chem J (1969)

by Carey W.E, Iadevaia R, Van De Burgt L, Helrich K
Published in Proceedings of the Annual Meeting New Jersey Mosquito Extermination Association (1976)

by Helrich, Kenneth, Rieman, William
Published in Analytical chemistry (Washington) (01.09.1947)

by Carey, W.E, Iadevaia, R, Van De Burgt, L, Helrich, K
Published in Proceedings of the ... annual meeting (1976)

by Sutherland, D.J, Shewierski, M, Marei, A.H, Helrich, K
Published in Mosquito News (1970)

by Helrich, K, Race, S, Reed, J
Published in Bulletin of environmental contamination and toxicology (01.01.1970)

by Helrich, Kenneth, Rieman, William
Published in Analytical chemistry (Washington) (01.09.1947)