You can do simple searches using this form:

Type	Originator	Title	Date
	Stummer,G	Atlas der Dachstein-Mammuthohle	1980
	Coase,A.C	Cathedral showcave official Guide	1980s?
	Morrison,T.A	Cornwall's Central Mines, The Northern District 1810-1895	1980
	Haycock,B and SWCC	OFD Ogof Ffynnon Ddu - S1011 - A Topographical Survey	1980
	Davies,M	OFD Ogof Ffynnon Ddu - S1016	1980
	Diaconu,G, Lascu,C & Ponta,C	Pestera Muierilor	1980
	Hadingham,E	Secrets of the ice age	1980
	Notebaart,C.W & Korowski,S.P	The Broken Hill Mine Zambia (Reprint)	1980
	Notebaart,C.W & Korowski,S.P	The Broken Hill Mine Zambia (Reprint)	1980
	Underwood,P	The Complete Book of Dowsing and Divining	1980