The Geysers of 'The Valley of Geysers'. A special report of GOSA Transactions (1991)

Bryan S.T., Hobart J., Warnock B., Rinehart J.S., Fenimore M., Colvin B. The Geysers of 'The Valley of Geysers'. A special report of GOSA Transactions. USA, California: B&J Printing. 1991. 60 p.