Artillery loop (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Artillery loop" in English language version.

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archive.org

Gregory, John Forrest (1989). Rock sport: tools, training, and techniques for climbers (1st ed.). US: Stackpole books. p. 41. ISBN 0811722961.

worldcat.org

search.worldcat.org

"The Sandy Douglass Knot". Knotting Matters. No. 77. International Guild of Knot Tyers. p. 34-35. ISSN 0959-2881.