Ira W. Cotton. Level 0 Graphic Input Protocol. RFC, 336:1-2, May 1972. [doi]
@article{rfc336, title = {Level 0 Graphic Input Protocol}, author = {Ira W. Cotton}, year = {1972}, month = {May}, doi = {10.17487/RFC0336}, url = {https://doi.org/10.17487/RFC0336}, researchr = {https://researchr.org/publication/rfc336}, cites = {0}, citedby = {0}, journal = {RFC}, volume = {336}, pages = {1-2}, }