Tần số rất thấp (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Tần số rất thấp" in Vietnamese language version.

refsWebsite

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2books.google.com

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archive.org (Global: 6^th place; Vietnamese: 4^th place)

Helliwell, R.A. (2006). Whistlers and Related Ionospheric Phenomena. Dover Publications, Inc. ISBN 0-486-44572-0.

books.google.com (Global: 3^rd place; Vietnamese: 6^th place)

The high-latitude ionosphere and its effects on radio propagation. Cambridge University Press. 2002. tr. 419. ISBN 0-521-33083-1. {{Chú thích sách}}: Đã bỏ qua tham số không rõ |authors= (trợ giúp)
Ghosh, S. N. (2002). Electromagnetic theory and wave propagation. CRC Press. tr. 89. ISBN 0-8493-2430-0.