00921nam a2200265Ia 4500 206602 BIBL 20160527194046.0 950807s1996 dcua b f001 0 eng 95035890 DLC DLC DLC n-us--- QB602.9 .B87 1996 523.2/028 20 Butrica, Andrew J. Local 67397 To see the unseen a history of planetary radar astronomy by Andrew J. Butrica. Washington, DC National Aeronautics and Space Administration 1996. xiii, 301 p. ill. 25 cm. The NASA history series Local 178801 NASA SP 4218 Local 140970 Includes bibliographical references and index. Planetology United States. Local 151586 Radar in astronomy. Local 156372 Planets Exploration. Local 151587 154467 154467 0 0 0 523_202800000000000_B987T 0 evl 226915 10 10 1 2016-05-27 299501 0 523.2028 B987t 80000001923237 2016-05-27 00:00:00 r:206602 z:NCC:D 6