Não informado. (1988). Service report: Power plants, maintenance, upgrading. Siemens AG.
Chicago-viite (17. p.)Não informado. Service Report: Power Plants, Maintenance, Upgrading. Erlangen, Alemanha: Siemens AG, 1988.
MLA-viite (8. p.)Não informado. Service Report: Power Plants, Maintenance, Upgrading. Siemens AG, 1988.
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