Dr S.P. Bhagat 
Kurma Purana [EPUB ebook] 

Lord Vishnu, in Kurm Avatar (tortoise incarnation), had first preached this Purana to Narad. In his turn, Narad narrated it to Sutji who later narrated this Purana to an assembly of the great sages. Initially, this Purana had four parts namely Bramhi Samhita, Bhagawati Samhita, Gauri Samhita and Vaishnavi Samhita. Presently, however, none of these Samhitas is available except Brahm Samhita. Present version too contains two parts-Purv and Uttar Parts.