TY - RPRT TI - The employment of weather satellite imagery in an effort to identify and locate the forest-tundra ecotone in Canada AU - Susan A. Aldrich AU - Frank T. Aldrich AU - Robert Dean Rudd PY - 1969 DO - 10.3133/ofr692 UR - https://pubs.usgs.gov/publication/ofr692 ID - ofr692 ER -