TY - GEN digital ID - 139449723 TI - A gap analysis of Michigan : Mi-Gap : November 2004 : final report and data PY - 2004 PB - Reston, Virginia US Department of the Interior, Geological Survey National Center DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:139449723 AB - ER -