C. O. Alley et al.'s article 'Apollo 11 Laser Ranging Retro-Reflector: Initial Measurements from the McDonald Observatory' was published in Science on 23 January 1970, in volume 167, issue 3917, pages 368–370, with DOI 10.1126/science.167.3917.368.
Sources
- Apollo 11 Laser Ranging Retro-Reflector: Initial Measurements from the McDonald Observatory (science.org)
- https://pubmed.ncbi.nlm.nih.gov/17790146/ (pubmed.ncbi.nlm.nih.gov)
- https://link.springer.com/chapter/10.1007/978-1-4613-3712-6_19 (link.springer.com)