Ch. A. Phase I, inventory and evaluation of 1984 programs and costs / by Janet Hren [and others]
Ch. B. Phase II, evaluation of 1984 field and laboratory quality-assurance practices / by Carolyn J. Oblinger Childress [and others]
Ch. C. Phase III, evaluation of existing data for use in assessing regional water-quality conditions and trends / by J. Michael Norris [and others].