ПЕРСПЕКТИВЫ ФОСФОРИТНОЙ ПРОМЫШЛЕННОСТИ НЕЗАВИСИМОЙ ЭСТОНИИ
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 41, Heft 2, S. 111
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In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 41, Heft 2, S. 111
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 38, Heft 4, S. 293
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 35, Heft 1, S. 11
In: Proceedings of the Academy of Sciences of the Estonian SSR. Geology, Band 35, Heft 3, S. 131
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 33, Heft 3, S. 193
In: Proceedings of the Academy of Sciences of the Estonian SSR. Geology, Band 32, Heft 1, S. 16
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 31, Heft 3, S. 197
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 30, Heft 3, S. 248
In: Proceedings of the Academy of Sciences of the Estonian SSR. Geology, Band 30, Heft 4, S. 156
In: Proceedings of the Academy of Sciences of the Estonian SSR. Geology, Band 38, Heft 3, S. 124
In: Proceedings of the Estonian Academy of Sciences. Humanities and Social Sciences, Band 34, Heft 1, S. 67
In: Proceedings of the Academy of Sciences of the Estonian SSR. Geology, Band 34, Heft 3, S. 77