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		| Paper: | Evidence for evolution of R Coronae Borealis stars and related objects |  
		| Volume: | 9, Cool Stars, Stellar Systems, and the Sun: Sixth Cambridge Workshop |  
		| Page: | 401 |  
		| Authors: | Lawson, W. A.; Cottrell, P. L. |  
		| Abstract: | Many of the R Coronae Borealis (RCB) stars, and other related hydrogen deficient carbon stars have been observed, to more fully investigate their photometric and spectroscopic properties. A provisional period-temperature relationship for these stars is discussed. The observed relationship is generally consistent with evolutionary models for RCB-type stars evolving toward higher temperatures. |  
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