Gurugnanam, B. Essential of Hydrogeology / by B. Gurugnanam - New Delhi: New India Publishing , 2009. - xvi, 268p. ISBN: 9.7881908513e+012 Subjects--Topical Terms: AquifersEarth ScienceGround WatersSaltwater Intrusion Dewey Class. No.: 551 / GUR/E