Monthly progress report. April 1968. Tracor Project 002 070 01.

This is the third monthly report, submitted in compliance with the schedule of Tracor Project 002 070 01 - Task I, describing work done during the month of April, 1968, on a study to evaluate present computer modeling techniques describing the hydrological, chemical, and biological systems of an estuary with respect to determining the optimum system for application to the Galveston Bay Estuary.