Eric L. Miller, Alan S. Willsky.
Includes bibliographical references (p. 34-36).
Supported by the Office of Naval Research. N00014-91-J-1004 Supported by the Air Force Office of Scientific Research. AFOSR-92-J-0002 Supported by the Advanced Research Project Agency under an Air Force grant. F49620-93-1-0604 Supported in part by a US Air Force Laboratory Graduate Fellowship.