@misc{indiciae6c1b8cf666ea,
  title = {Porting the excitation-emission-matrix 3-D plotting program from Applesoft BASIC to IBM compatible GW-BASIC},
  author = {Arnold F. Theisen},
  year = {1989},
  doi = {10.3133/ofr89312},
  url = {https://pubs.usgs.gov/publication/ofr89312},
  note = {Source identifier: ofr89312}
}