'Untitled', Harpers
Tags: 1980s; 1986; 1986-11-1; Astrobiology; Biology; Civilization; Human-alien encounters; Interstellar communication; Modern; Sagan, Carl
'Charting the nuclear winter', Harpers
Tags: 1980s; 1984; 1984-3-1; Atomic and Nuclear Physics; Charts; diagrams; Environmental aspects; etc; Harwell, Mark A.; Nuclear warfare; Physics; Sagan, Carl
'The galactic telephone', Harpers
Tags: 1970s; 1973; 1973-12-1; Arecibo; Cosmology; Interstellar communication; Physics; Puerto Rico; Radio astronomy; Sagan, Carl
atom, dcmes-xml, json, omeka-xml, rss2
