1. Proceedings, 1st Protactinium Conference,1963
2. Proceedings, 2nd Protactinium Conference,1965
3. Protactinium;Brown;Quarterly Reviews,1963
4. The Radiochemistry of Protactinium;Kirby;Report NAS-NS-3016,1959
5. Crystal chemical studies of the 5f-series of elements. I. New structure types