“DESIGN AND FABRICATION OF a DRILL JIG FOR AN END COVER OF a LOW PRESSURE VACUUM PUMP”. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695 IJERAT, vol. 2, no. 1, May 2016, pp. 232-6, https://ijerat.com/index.php/ijerat/article/view/275.