Columbia subject headings:
Labor unions--Turkey.
Petroleum industry and trade--Turkey.
Petroleum workers--Labor unions--Turkey.
Türkiye Petrol, Kimya, Lastik İşçileri Sendikası.
Harvard subject headings:
Labor unions--Turkey
Petroleum industry and trade--Turkey.
Petroleum workers--Turkey--Labor unions.
Türkiye Petrol, Kimya, Lastik İşçileri Sendikası.
Princeton subject headings:
Labor unions--Turkey.
Petroleum industry and trade--Turkey.
Türkiye Petrol, Kimya, Lastik İşçileri Sendikası.