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Information at work
Barratt Brown, Michael, (1978)
The changing conceptualizations of informal work in developed economies
Williams, Colin C., (2010)
Measuring informal work in developed nations
Joassart, Pascale, (2010)
Evaluating competing theories of the shadow economy : some lessons from an English locality
Consumer services and economic development
Williams, Colin C., (1997)
The new barter economy : an appraisal of Local Exchange and Trading Systems (LETS)
Williams, Colin C., (1996)