WAYS TO COMMUNICATE WITH HIGHLY DEVELOPED ALIEN (EXTRATERRESTRIAL) CIVILIZATIONS ARE PRESENTED. THE GRAVITATION-WAVE METHOD IS CITED AS BEING THE MOST SUITABLE, DUE TO THE INADEQUACIES OF RADIO-WAVE COMMUNICATIONS.

Addeddate 2010-07-09 10:23:06 Documentid 19740003098 Identifier nasa_techdoc_19740003098 Identifier-ark ark:/13960/t2p569839 Ocr ABBYY FineReader 8.0 Ppi 300 Rights Public Domain Year 1973