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White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.
White pine blister rust study, 38th year after planting. On USFS land in the Superior National Forest near Tofte, Minnesota.