title: Properties and composition of lunar materials: Earth analogies.
abstract: The sound velocity data for the lunar rocks were compared to numerous terrestrial rock types and were found to deviate widely from them. A group of terrestrial materials were found which have velocities comparable to those of the lunar rocks, but they do obey velocity-density relations proposed for earth rocks.
authors.forename: E
authors.initials: E
authors.lastname: Schreiber
authors.forename: O L
authors.initials: OL
authors.lastname: Anderson