Selvi, A. Mury Thiruvalar Map elements and topographic map interpretation / A. Mury Thiruvalar Selvi - Chennai : Thirukkural Pathippagam, c2009 - 108 p. ; 20 cm. ISBN: Rs. 60.00 (pbk.) Subjects--Topical Terms: Topographic mapsGeographic information systemsMaps Dewey Class. No.: 369.43