O12; O13; Q56
Q12, O13, C93, Q18, O21, O53
O12,O13, O33, Q12,Q16
C93, J54, O12, O13
Q41, D12, Q48, O13, C93
N57,O12,O13,Q12,Q16,Q18
), O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment), C93 (Field Experiments)
Q50, Q54, Q56, Q58, O13, O10
I15, J22, J24, J43, O13
O13, Q5