P. A. Richards

The design, construction and commissioning of a pilot scale rig for determining the discharge rates and the solid fractions of liquid/solid mixtures discharging from vessels under different conditions. Part 1: Packed beds in conical-bottomed hoppers.

J. W. Farrent, B. O. Mills Lamptey, P. A. Richards, 1990 .

Lagrangian modeling and TMDL development in low-gradient streams

P. A. Richards, M. G. Waldon, E. E. Smythe, 1999 .

Factors in software quality: concept and definitions of software quality

P. A. Richards, G. Walters, J. A. McCall, 1977 .