Professor and Chair of Biology, Shepherd University, Shepherdstown, WV 25443
Simpson, P.D., E.P. Karlander and S.D. Van Valkenburg. 1978. The growth rate of Mychonastes ruminatus Simpson et Van Valenburg under various light, temperature salinity regimes. Br. Phycol. J. 13: 291-298.
Simpson, P.D. and S.D. Van Valkenburg. 1978. The ultra structure of Mychonastes ruminatus gen. et sp. nov., a new member of the
Chlorophyceae isolated from brackish water. Br. Phycol. J. 13: 117-130.