Dangos 1 - 4 canlyniadau o 4 ar gyfer chwilio 'Lewis, Helen R.', amser ymholiad: 0.01e Mireinio'r Canlyniadau
  1. 1

    Washability characteristics of some Philippine coals gan Ejercito, Telesforo A.

    Cyhoeddwyd 1967
    Llyfr

    Washability characteristics of some Philippine coals
  2. 2

    Washability characteristics of some Philippine coals gan Ejercito, Telesforo A.

    Cyhoeddwyd 1967
    Llyfr

    Washability characteristics of some Philippine coals
  3. 3

    Washability characteristics of some Philippine coals / Telesforo A. Ejercito and Helen R. Lewis. gan Ejercito, Telesforo A.

    Cyhoeddwyd 1967
    Llyfr

    Washability characteristics of some Philippine coals / Telesforo A. Ejercito and Helen R. Lewis.
  4. 4

    Blending carbonization of foreign and local coals gan Ejercito, Telesforo A.

    Cyhoeddwyd 1966
    Llyfr

    Blending carbonization of foreign and local coals

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