@article{McKillip_2018, title={Objective Lens}, volume={4}, url={https://openjournals.bsu.edu/finefocus/article/view/1541}, DOI={10.33043/FF.4.2.151-152}, number={2}, journal={Fine Focus}, author={McKillip, John L.}, year={2018}, month={Dec.}, pages={151–152} }