6. Gazzetteer of Bombay Presidency, Vol XVIII , Part III - Poona (1885)
7. Bombay - Poona (Souvenir of Indian Science Congress) - 1934
8. Deluge in Poona - Brahme, Gole (1967)
The most detailed though is Poona, Queen of Deccan - a thick coffee table sized tome costing 3 grand.
Report on Water Supply Project of Poona Cantonment - Capt Philip Hart (1858)
Some more info available in Peshwa Daftars and Residency Correspondence etc, but these books are more or less dedicated to Pune history (or the then present) and make for good reading.