TY - BOOK AU - Grady,M.M. TI - Astrobiology SN - 1560988495 (alk. paper) AV - QB54 .G73 2001 U1 - 576.8/39 21 PY - 2001/// CY - Washington, D.C. PB - Smithsonian Institution Press KW - Exobiology KW - Life on other planets N1 - Includes bibliographical references (p. 96) and index ER -