Rai, Subas. Quaternary geology of son : an implication for prehistoric archaeolgy / Subas Rai. - Varanasi : Kala Prakashan , 1990. - 179p. : ills.,figs.,plates,tables ; 22cm . NULL ISBN: Rs. 275.00 (pbk) Subjects--Index Terms: QUATERNARY PERIOD Dewey Class. No.: 551.79 / RAI/Q