ACKNOWLEDGEMENTS

Since 1980 the Natural Resources Defense Council has sponsored the Nuclear Weapons Data Center. The purpose of the Center is to compile and disseminate accurate information on the world's nuclear forces in order to promote a more informed debate on nuclear weapons and arms control issues. The Center has published five volumes of its Databook series describing U.S., Soviet, British, French and Chinese nuclear arsenals, and the U.S. nuclear weapons production complex. Since May 1987, the Center staff has contributed the "NRDC Nuclear Notebook" column to The Bulletin of the Atomic Scientists.

The authors would like to thank Thomas B. Cochran, Christopher E. Paine, David Culp, S. Jacob Scherr, Tanya Washington, Gaurav Kampani, Bill Christie, Wayne Nail and Sonah Allie for their assistance and encouragement in this project.

NRDC would like to thank the W. Alton Jones Foundation, Inc., the HKH Foundation, The John D. and Catherine T. MacArthur Foundation, The John Merck Fund, the Ploughshares Fund, The Prospect Hill Foundation, the Spanel Foundation, The Winston Foundation for World Peace, and an anonymous donor for their generous support of the Nuclear Program.