"jeffe, leonard . "
communications in space: / leonard.. jeffe - 1 ed. - "usa : holt,rinehart 1966." - ", 176p.; 20 cm." - holt library of science series iii .
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621. 380 423 jef
communications in space: / leonard.. jeffe - 1 ed. - "usa : holt,rinehart 1966." - ", 176p.; 20 cm." - holt library of science series iii .
--
621. 380 423 jef