D90, I31, O33, Z13
Q54; Q56; O13; I18
i21, i23, c93, d83, o33
M41 – Accounting O33 – Technological Change: Choices and Consequences; Diffusion Processes L26
D91, O33, Z13, C91
R23, O16, I32, O33
O13, Q48, H26
J64, O15, O33, D83, J68, C93, D91, J24, O12
D81, C90, O33
J24, J31, O33, D82