Theodore S. Lewis. Character manipulation in FORTRAN. Communications of the ACM, 6(2):65, 1963. [doi]
@article{Lewis63, title = {Character manipulation in FORTRAN}, author = {Theodore S. Lewis}, year = {1963}, doi = {10.1145/366246.366253}, url = {http://doi.acm.org/10.1145/366246.366253}, researchr = {https://researchr.org/publication/Lewis63}, cites = {0}, citedby = {0}, journal = {Communications of the ACM}, volume = {6}, number = {2}, pages = {65}, }