C91, D83, J24, J54
Q41, D12, Q48, O13, C93
G52, Q14, Q12, O12
N57,O12,O13,Q12,Q16,Q18
D72, D83, D91, E71
C93, D83, D91, J22, J81
C93, O33, L82, D83
C93, D83, J31, J71, M51
), O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment), C93 (Field Experiments)
Q50, Q54, Q56, Q58, O13, O10