Minimizing computer cost for the solution of certain scientific problems. - Gerald N. Pitts; Paul B. Crawford; Barry L. Bateman (AFIPS Fall Joint Computing Conference, 1970)

Numerical simulation of subsurface environment. - Barry L. Bateman; Paul B. Crawford; Dan D. Drew (AFIPS Fall Joint Computing Conference, 1971)

Simulating large flow networks in underground media. - Gerald N. Pitts; Paul B. Crawford (WSC, 1971)