Chaudhary, Shrimati Rekha. Vyavsyik Shiksha Nirdeshan / By Shrimati Rekha Chaudhary. - 1st Ed. - New Delhi : Shivank Prakashan, 2017. - viii,263p. ; 00 cm. ISBN: 9789383980444 Dewey Class. No.: 371.4250954 / CHA