article published in 1964
guidebook published in 1970
scientific article published in 1978
article by D. A. Jackson et al published 1978 in Britannia
article published in 1967
article published in 1967
scientific article published on January 1967
scientific article published on January 1968
article published in 1978
article published in 1959
scientific article published in 1982
scientific article published in 1986
scientific article published in 1974
scientific article published on January 1, 1976
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