my own work Sources: Lists of police-station areas under the Kolkata Police and under the South 24 Parganas Police are provided by the Ganashakti Ready Reckoner 2005. National Atlas & Thematic Mapping Organisation, Dept. of Science & Technology, Govt. of India, Administrative Map of Calcutta, Plate 15, 2nd Edition, 1988, Reg. No. 2844 E/57 – 500...