Columbia subject headings:
Harvard subject headings:
Electric lines--Europe, Eastern--Case studies.
Electric lines--Poland--Case studies.
Energy consumption--Poland.
Natural gas pipelines--Europe, Eastern--Case studies.
Natural gas pipelines--Poland--Case studies.
Petroleum pipelines--Europe, Eastern--Case studies.
Petroleum pipelines--Poland--Case studies.
Power resources--Poland--International cooperation--Case studies.
Princeton subject headings:
Case studies.
Electric lines--Europe, Eastern--Case studies.
Electric lines--Poland--Case studies.
Energy consumption--Poland.
Natural gas pipelines--Europe, Eastern--Case studies.
Natural gas pipelines--Poland--Case studies.
Petroleum pipelines--Europe, Eastern--Case studies.
Petroleum pipelines--Poland--Case studies.
Power resources--Poland--International cooperation--Case studies.