Thank you :D
I need two - one from 1996 and one from 2009 - but if you can just get me the 2009 that would be an absolute godsend!! - I'll pm you my email.
Sorry for the horrible referencing :)
Ram A. Cnaan, Femida Handy, and Margaret Wadsworth
Defining Who is a Volunteer: Conceptual and Empirical Considerations
Nonprofit and Voluntary Sector Quarterly September 1996 25: 364-383, doi:10.1177/0899764096253006
Jeffrey L. Brudney and Lucas C. P. M. Meijs
It Ain't Natural: Toward a New (Natural) Resource Conceptualization for Volunteer Management
Nonprofit and Voluntary Sector Quarterly, August 2009; vol. 38, 4: pp. 564-581., first published on April 16, 2009