@misc{indiciae247f25ab3091,
  title = {The evolution of lignin - Experiments and observations.},
  author = {Siegel, S. M. and Carrol, P. and Umeno, I. and Corn, C.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730044847},
  note = {Source identifier: 19730044847}
}