@misc{indiciae2b61ebad197c, title = {How is percussion done?}, author = {H C BURGER and G CASTELEYN and F L J JORDAN}, year = {1952}, doi = {10.1111/j.0954-6820.1952.tb13849.x}, url = {https://pubmed.ncbi.nlm.nih.gov/14932783/}, note = {Source identifier: 14932783} }