publisher: Springer
format: hardcover
language: English
ISBN:
0387532137 (9780387532134)
publisher: Dutton Books, Paperback" /> publish date: December 1st 1999
format: paperback
language: English
ISBN:
0525451668 (9780525451662)
publisher: RAND Corporation
format: paperback
language: English
ISBN:
0833008293 (9780833008299)