C93, J12, J13
C93, J13, D13
Q54, Q51, D83, C91, Q58
O13 (Economic Development: Agriculture; Natural Resources; Energy; Environment; Other Primary
Products), Q48 (Energy: Government Policy), C93 (Design of Experiments: Field Experiments), L94 (Industry
C81, C93, D81
C93, D83, J16, L26, O12
C93, J15, J61, J71
J22, J16, J38, D83
D83, H60, H31
F22, J61, O15, C93, O12