Coal miners' pocketbook: principles, rules, formulas, and tablas. 12.ed.
Zern,E.N
Coal miners' pocketbook: principles, rules, formulas, and tablas. 12.ed. - 12.ed. - New York - EEUU McGraw-Hill 1928 - 1273p. Azul y letras dor.17cm - .
no
--Mineria--Obra de referencia--Minas de carbon--Guia del minero--Geologia--
Geologia
Coal miners' pocketbook: principles, rules, formulas, and tablas. 12.ed. - 12.ed. - New York - EEUU McGraw-Hill 1928 - 1273p. Azul y letras dor.17cm - .
no
--Mineria--Obra de referencia--Minas de carbon--Guia del minero--Geologia--
Geologia