Background economics.
Pearson
B
B
D000383:Agriculture / Q000191:economics; D001937:Brassica; D018556:Crops, Agricultural / Q000191:economics* / Q000235:genetics; D005523:Food Supply; D005818:Genetic Engineering / Q000191:economics*; D014342:Truth Disclosure; D006113:United Kingdom; D003313:Zea mays