EXTRATERRESTRIAL INTELLIGENCE - OBSERVATIONAL APPROACH

[1] SEARCHING FOR INTERSTELLAR COMMUNICATIONS [J]. NATURE, 1959, 184 (4690) : 844 - 846

[2] MODEST ALL-SKY SEARCH FOR NARROWBAND RADIO RADIATION NEAR 21-CM HYDROGEN LINE [J]. ICARUS, 1977, 30 (02) : 267 - 273

[3] DRAKE FD, 1977, JUN JPL WORKSH UT EX

[4] DRAKE FD, 1963, INTERSTELLAR COMMUNI, P176

[5] DRAKE FD, 1973, COMMUNICATION EXTRAT, P239

[6] EASTERLING MF, UNPUBLISHED

[7] EDELSON RE, ASTRONAUT ACTA

[8] EDELSON RE, 1976, 27TH C INT ASTR FED

[9] GLASER PE, 1974, CR2357 CONTR

[10] SEARCHING FOR EXTRATERRESTRIAL CIVILIZATIONS [J]. SCIENCE, 1977, 196 (4290) : 616 - 621

[1] SEARCHING FOR INTERSTELLAR COMMUNICATIONS [J]. NATURE, 1959, 184 (4690) : 844 - 846

[2] MODEST ALL-SKY SEARCH FOR NARROWBAND RADIO RADIATION NEAR 21-CM HYDROGEN LINE [J]. ICARUS, 1977, 30 (02) : 267 - 273

[3] DRAKE FD, 1977, JUN JPL WORKSH UT EX

[4] DRAKE FD, 1963, INTERSTELLAR COMMUNI, P176

[5] DRAKE FD, 1973, COMMUNICATION EXTRAT, P239

[6] EASTERLING MF, UNPUBLISHED

[7] EDELSON RE, ASTRONAUT ACTA

[8] EDELSON RE, 1976, 27TH C INT ASTR FED

[9] GLASER PE, 1974, CR2357 CONTR

[10] SEARCHING FOR EXTRATERRESTRIAL CIVILIZATIONS [J]. SCIENCE, 1977, 196 (4290) : 616 - 621