This series of articles is spread over 3 catalog records 3-12, 3-14 and 3-15. This record includes the articles numbered 5, 6, 7, 8, 13, 14, and 15. Article 5- Pettengill, G. H., Briscoe, H. W., Evans, J. V., Gehrels, E., Hyde, G. M., Kraft, L. G., Price, R., Smith, W. B. "A radar investigation of Venus" The Astronomical Journal 67 no.4 (May 1962): 181-190. Article 6 -Smith, W. B., "Radar observations of Venus, 1961 and 1959" The Astronomical Journal 68 no. 1 (Feb 1963) 15-21. Article 7- Price, R., Green, Jr., P. E., Goblick, Jr., T. J., Kingston, R. H., Kraft, Jr., L. G., Pettengill, G. H., Silver, R., Smith, W. B. "Radar echoes from Venus" Science 129 no. 3351 (Mar 20 1959) 731-733. Article 8- Pettengill, G. H., Price, R. "Radar Echoes from Venus and a new determination of the solar parallax" Planetary Space Science 5 no. 1 (Jan 1961) 71-74. Article 13- Evans, J. V., Taylor, J. N. "Radio echo observations of Venus" Nature 184 (Oct. 31 1959) 1358-1359. Article 14 -"Thompson et al" "A new determination of the solar parallax by means of radar echoes from Venus" Nature 190 no. 4775 (May 6 1961) 519-520. Article 15-Maron, Irving, Luchak, George, Blitzstein, William "Radar observation of Venus" Science 134 (Nov. 1961) 1419-1421. Processing note, 3-10 and 3-12 and 3-14 seem to have been replaced. Originally 3-10 through 3-12 were a series of negatives, and 3-14 was historical photos. The item currently marked as 3-10 appears to originally have been 3-15b, 3-11 is missing and 3-12 and 3-14 are currently a series of articles on radar mapping. The original materials may have been separated and placed into a photographic collection.
