Bibliografía sobre energética-carbón
Subtitle: índice de autores y geográfico
By: por Angela Hernández de Caldas y María Teresa Ramírez Vargas.
Contributors: Ramírez Vargas, María Teresa, joint author.
Publisher: s.n.
Published: 1977
Place of publication: [s.l
Language: spa
Number of pages: 15
Subjects: Power resources -- Indexes.; Coal -- Indexes.