龜算春夏秋成遇冬則停
龜算春夏秋成遇冬則停
爲算之法，位别一龜。龜之四面爲十二時，以龜首指寅爲一，指卯爲二，指辰爲三，指巳爲四，指午爲五，指未爲六，指申爲七，指酉爲八，指戌爲九，指亥爲十。龜頭指不以爲數，故云遇冬則停也。
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Text and scans: Shidian Guji (Peking University – ByteDance open ancient texts). Edition details are given per book. Shidian Guji
