Many friends, colleagues, and research staff members have directly and indirectly
contributed to this book. It is impossible to acknowledge the contribution of each. Still, we
would like to recognize several persons as well as institutions that have been particularly
helpful. Research funds were provided by the Kentucky Agricultural Experiment Station and
by the Ford Foundation. John Myers of the Current Research Information System provided
us with a computer tape listing current projects. Carolyn Sachs was extremely helpful in …