1. The Measure of the Moon;Baldwin,1963
2. Determination of Physical and Mechanical Properties of the Lunar Surface Layer by means of Luna 13 automatic station;Cherkasov,1967
3. Lunar surface mechanical properties;Christensen,1967
4. Lunar surface mechanical properties, 43-88;Christensen,1967
5. The application of polarized light for the study of the surface of the moon;Dollfus,1965