Blueberries for Sal (Viking Kestrel picture books) by Robert McCloskey; 1948. Hardcover (Ch-PIC)

Kuplink, kuplank, kuplunk! Sal and her mother a picking blueberries to can for the winter. But when Sal wanders to the other side of Blueberry Hill, she discovers a mama bear preparing for her own long winter. Meanwhile Sal's mother is being followed by a small bear with a big appetite for berries! Will each mother go home with the right little one?