journal article published in 2005

journal article published in 2005

journal article published in 2004

abstract published in 1998

abstract published in 1997

field study published in 1992

field study published in 1990

field study published in 1990

field study published in 1991

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field study published in 1990

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field study published in 1993

field study published in 1991

field study published in 1991

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field study published in 1995

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field study published in 1993

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field study published in 1993

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field study published in 1998

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field study published in 1998

field study published in 1998

field study published in 1999

abstract published in 2004

journal article published in 1992

journal article published in 2005

abstract published in 2002