P48, Q58, H23, Q54
Q14, Q54
Q50, Q53, Q54
Q54, Q58, O15, C93
D80, D84, D90, Q54, Q50, D03
D1, D9, H43, H54, Q54
D12, O12, Q54
), O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment), C93 (Field Experiments)
Q50, Q54, Q56, Q58, O13, O10
C25; Q01; Q25; Q54; Q57