@misc{indiciae8384bf936351,
  title = {Survey of vesicular-arbuscular mycorrhizae in lettuce production in relation to management and soil factors},
  author = {R. L. Miller and L.E. Jackson},
  year = {1998},
  doi = {10.1017/s0021859697005212},
  url = {https://pubs.usgs.gov/publication/70021040},
  note = {Source identifier: 70021040}
}