A modular system for trapping and mass-marking bumblebees: applications for studying food choice and foraging range Andrew P. Martin, Norman L. Carreck, Jennifer L. Swain, Dave Goulson, Mairi E. Knight, Roddy J. Hale, Roy A. Sanderson and Juliet L. OsborneApidologie, 37 3 (2006) 341-350DOI: https://doi.org/10.1051/apido:2006004