izlaidumi no Roy, G C Datta (Development Environergy Services Limited (DESL), New Delhi)

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Cover for Roy, G C Datta (Development Environergy Services Limited (DESL), New Delhi) · Implementing Energy Efficiency in Industries (Paperback Book) (2026)

Implementing Energy Efficiency i... (2026)

Roy, G C Datta (Development Envi...

Cover for Roy, G C Datta (Development Environergy Services Limited (DESL), New Delhi) · Implementing Energy Efficiency in Industries (Hardcover Book) (2024)

Implementing Energy Efficiency i... (2024)

Roy, G C Datta (Development Envi...