This document is a Pacific Northwest Laboratory Monthly Activities Report for March 1967, for the Division of Production and Hanford Plant Assistance Programs. Included in this report are brief status reports on the following programs: (1) Direct AEC Sponsored Programs including Columbia River studies, whole-body measurements of Richland school children, field tests using the U{sup 235} Analyzer, and criticality studies (2) Assistance to Douglas United Nuclear including transducer development studies, design of a simulated fuel column, and process technology (3) Assistance to General Electric N-Reactor Department including various fuel element studies, N-process tube scratching studies, and other reactor-related tests and simulations (4) Assistance to Isochem including experimental studies on corrosion, separations instrumentation, etc. and (5) Technical Assistance to the Hanford Plant including programs on environmental evaluations, dosimetry studies, and instrumentation services.