Long delayed echo (Polish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Long delayed echo" in Polish language version.

refsWebsite

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8,569^th place

9,075^th place

low place

low place

arrl.org

Stan Horzepa, WA1LOU: An Extremely Long Delayed Echo. 2012-10-19. [dostęp 2020-05-06]. (ang.).

df5ai.net

V. Grassmann, Long-delayed radio echoes, Observations and interpretations, VHF Communications vol 2, pp. 109-116, 1993.