1. Argon 40-argon 39 dating of Apollo sample 15555;Alexander;Science,1972
2. Rare-gas analyses on neutron irradiated Apollo 12 samples;Alexander,1972
3. Rare gas analyses on neutron irradiated lunar samples (Abstract);Alexander,1972
4. Age, exposure history, and trace element composition of some Apollo 14 and 15 rocks;Alexander,1973
5. Radiogenic xenon and argon in 14318 and implications;Alexander,1973