Apurva Pathak, Hemwati Nandan, Rakshit Sthapak, Mangleshwar Dubey and Sonia Sharma 2019. Comparative assessment of hydrofluoric acid and sandblasting etching technique on porcelain crowns. Asian Pacific Journal of Health Sciences. 6, 2 (Jun. 2019), 175–181. DOI:https://doi.org/10.21276/apjhs.2019.6.2.25.