@misc{indiciae1403ec35f301,
  title = {Lunar surface engineering properties experiment definition Quarterly report, 1 Oct. - 31 Dec. 1968},
  author = {Goodman, R. E. and Houston, W. N. and Mitchell, J. K. and Witherspoon, P. A.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700003247},
  note = {Source identifier: 19700003247}
}