Yorkshire Subterranean Society

	Newsletter
		No.191, 193-198, 200, 201, 203, 205, 206, 208-212, 213-215, 218, 221, 222, 224, 229, 231, 232, 234, 238-241, 243-246, 248-252, 263, 265, 275.

	Journal
		YSS No.1		March	1976
		YSS No.2		March	1979
		YSS No.3