@article{033-000-01163-6, recid = {178455}, author = {Butrica, Andrew J.}, title = {To see the unseen : a history of planetary radar astronomy /}, publisher = {National Aeronautics and Space Administration, NASA History Office :}, address = {Washington, D.C. :}, number = {033-000-01163-6}, pages = {xiii, 301 p. :}, year = {1996}, note = {Shipping list no.: 96-0060-S.}, url = {http://library.usi.edu/record/178455}, }