Description
Item Description:Title from electronic title page (National Academies Press, viewed Nov 30, 2009)
Physical Description:1 online resource (xxii, 108 p.) : ill.
Bibliography:Includes bibliographical references
ISBN:0309116996
0309117003 (electronic bk.)
6612008016 (electronic bk.)
9780309116992
9780309117005 (electronic bk.)
9786612008016 (electronic bk.)