Descripción
Notas:"March 1990."
"National Academy of Sciences, National Academy of Engineering, Institute of Medicine."
Co-sponsored by the Research Roundtable and the National Science Foundation at the National Academy of Sciences, Washington, D.C., March 23, 1989--Cf. p.v.
Descripción Física:1 online resource (vii, 115 pages) : illustrations
Bibliografía:Includes bibliographical references.
ISBN:0585144087
9780585144085