found: Glaciers, ice on the move, c1990:CIP t.p. (Sally M. Walker)
found: Hippos, 1997:CIP t.p. (Sally M. Walker) data sheet (b. Oct. 16, 1954)
found: Sinking the Sultana, 2017:t.p. (Sally M. Walker) Jkt. p. 3 (author of Blizzard of glass, We are the weather makers, Boundaries, how the Mason-Dixon line settled a family feud and divided a nation, etc.)
found: Walker, Sally M. Underground fire [SR]:cover frame (Sally M. Walker)
found: Amazon website, Jan. 31, 2023(Sally M. Walker; Sally Walker; lives in Illinois; author of Underground Fire, Glaciers, Ice on the Move, Blizzard of Glass, Written in Bone, Fossil Fish Found Alive, Secrets of a Civil War Submarine)
found: Sally M. Walker website, Jan. 31, 2023(Sally M. Walker; author of early readers, history, exploring the natural world, picture books, STEM series)
found: Wikipedia website, Jan. 31, 2023(Sally M. Walker; Sally Macart Walker; American writer of nonfiction for children; Walker is known for books written in both Spanish and English)
