Children's book about bear family & home???

My mom got a book from the library when I was a little girl (circa 1970-1979). It was about a bear family and it showed each bear's bedroom or home. Each was room was unique...I think there were 4 rooms on a page and the youngest bear still lived with mommy & daddy bear. We could never find it again. Anyone know the title???? I would love to find it again. Thanks!