"Swirl by Swirl: Spirals in Nature", °ÄÃÅÁùºÏ²Ê¿ª½±app, April 27, 2012
/winner/swirl-swirl-spirals-nature-0 (Accessed September 20, 2024)
Document ID: 1fca5b1b-62be-4b31-b7eb-9ca04b04f7c0
