Terrestrial biospheric carbon fluxes : quantification of sinks and sources of CO2 : Bad Harzburg, Germany, 1-5 March 1993 / ed. by Joe Wisniewski and R. Neil SampsonTerrestrial biospheric carbon fluxes : quantification of sinks and sources of CO2 : refereed papers from the International Workshop held in Bad Harzburg, Germany, 1-5 March 1993 / ed. by: Joe Wisniewski and R. Neil Sampson