@misc{indiciae8549c824441f,
  title = {Elemental composition of lunar surface material},
  author = {Mapper, D. and Smales, A. A. and Webb, M. S. W. and Webster, R. K. and Wilson, J. D.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700065490},
  note = {Source identifier: 19700065490}
}