Robert H. Hill

Measurement of p-nitrophenol in the urine of residents whose homes were contaminated with methyl parathion.

D. Barr, J. Pirkle, L. Needham, 2002, Environmental health perspectives.

Residues of chlorinated phenols and phenoxy acid herbicides in the urine of Arkansas children

L. Needham, S. Smith, D. Fast, 1989, Archives of environmental contamination and toxicology.

The priority toxicant reference range study: interim report.

J. Pirkle, E. Sampson, L. L. Needham, 1995, Environmental health perspectives.