Elementary school science activities
Nelson, Pearl Astrid.
Elementary school science activities by Pearl Astrid Nelson. - Englewood Cliffs, N.J. Prentice-Hall [1968] - ix, 210 p. illus.
Bibliography: p. 199-202.
68019972
Science--Study and teaching (Elementary)
Elementary school science activities by Pearl Astrid Nelson. - Englewood Cliffs, N.J. Prentice-Hall [1968] - ix, 210 p. illus.
Bibliography: p. 199-202.
68019972
Science--Study and teaching (Elementary)