Konkresi (geologi): Perbedaan antara revisi
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Rescuing 2 sources and tagging 0 as dead.) #IABot (v2.0.8 |
Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.8 |
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* Hanson, W.D., and J.M. Howard, 2005, [http://geology.ar.gov/mis_pub_info/MP%2022%20Prim%20Boulders.pdf ''Spherical Boulders in North-Central Arkansas'' PDF version, 2.8 MB] Arkansas Geological Commission Miscellaneous Publication n. 22, pp. 1–23.
* Heinrich, P.V., 2007, [http://www.hgms.org/BBG/Aug07.pdf ''The Giant Concretions of Rock City Kansas'' PDF version, 836 KB] BackBender's Gazette. vol. 38, no. 8, pp. 6–12.
* Hokianga Tourism Association, nd, [http://hokiangatourism.org.nz/activities/attractions/koutu-boulders ''Koutu Boulders ANY ONE FOR A GAME OF BOWLS?''] and [http://www.hokianga.net.nz/hokianga/koutu/koutu_boulders.htm ''Koutu Boulders, Hokianga Harbour, Northland, New Zealand''] {{Webarchive|url=https://web.archive.org/web/20081014032805/http://www.hokianga.net.nz/hokianga/koutu/koutu_boulders.htm |date=2008-10-14 }} High-quality pictures of cannonball concretions.
* Irna, 2006, [http://irna.lautre.net/Tout-ce-que-la-nature-ne-peut-pas,45.html All that nature can never do, part IV: stone spheres]
* Irna, 2007a, [http://irna.lautre.net/Stone-balls-in-France-too.html Stone balls: in France too!]
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