Wilfred E. Pereira

Nonpoint source contamination of the Mississippi River and its tributaries by herbicides

W. E. Pereira, Wilfred E. Pereira, Frances D. Hostettler, 1993 .

Occurrence, distributions, and transport of herbicides and their degradation products in the Lower Mississippi River and its tributaries

C. Rostad, W. E. Pereira, Wilfred E. Pereira, 1990 .