Columbia subject headings:
Genetic engineering--Law and legislation--European Union countries.
Genetic engineering--Law and legislation--Turkey.
Organic farming--Law and legislation--European Union countries.
Organic farming--Law and legislation--Turkey.
Harvard subject headings:
Genetically modified foods--Law and legislation--European Union countries.
Genetically modified foods--Law and legislation--Turkey.
Organic farming--Law and legislation--European Union countries.
Organic farming--Law and legislation--Turkey.
Princeton subject headings:
Genetic engineering--Law and legislation--European Union countries.
Genetic engineering--Law and legislation--Turkey.
Organic farming--Law and legislation--European Union countries.
Organic farming--Law and legislation--Turkey.