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- 1972 ,no. 5-8. Economic geology : bulletin of the Society of Economic Geologists. Lancaster : Economic geology, 1972. 2 zv. Iné [Copy count : 1, currently available 0, at library only 1]
- 1972 ,no. 1-4. Economic geology : bulletin of the Society of Economic Geologists. Lancaster : Economic geology, 1972. 2 zv. Iné [Copy count : 1, currently available 0, at library only 1]