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!!!
Carl!Grove!!
The!Airship!Wave!of!1909!!!!!Part!1!'!Flying!Saucer!Review!Vol.!16,!No.!6!(Nov'Dec!1970),!pp.!9!–!11!!Part!2!'!Flying!Saucer!Review!Vol.!17,!No.!1!(Jan'Feb!1971),!pp.!17!'!19!