The future of small scale mining : first international conference

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The future of small scale mining : first international conference

sponsored by the United Nations Institute for Training and Research (UNITAR) and the Consejo de Recursos Minerales and Secretaría de Patrimonio y Fomento Industrial (SEPAFIN) of the Government of Mexico, in cooperation with the United Nations Development Programme ... [et al.], 26 November-5 December 1978, Jurica, Qro., Mexico ; J. Barnea and G. P. Salas, scientific secretaries ; R. F. Meyer and J. S. Carman, editors

UNITAR : McGraw-Hill, c1980

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"UNITAR CR/12."

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