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==see also==* mathematical instrument* integraph==references====external links==* hatchet planimeter* p. kunkel: whistleralley site, "the planimeter"* larry's planimeter platter* wuerzburg planimeter page* robert foote's planimeter page* computer model of a planimeter* tanya leise's planimeter explanations* tanya leise: "as the planimeter’s wheel turns"* make a simple planimeter* photo: geographers using planimeters (1940–1941)* o. knill and d. winter: ;;green's theorem and the planimeter"
* hatchet planimeter* p. kunkel: whistleralley site, "the planimeter"* larry's planimeter platter* wuerzburg planimeter page* robert foote's planimeter page* computer model of a planimeter* tanya leise's planimeter explanations* 'tanya leise: "as the planimeter’s wheel turns"* make a simple planimeter* o. knill and d. winter: ;;green's theorem and the planimeter"