Barr,, George
Science projects for young people / George Barr ; il. Mildred Waltrip
Science projects for young people / George Barr ; il. Mildred Waltrip
. - New York : Dover Publications, cop. 1964
. - 153 p. : il. 22 cm
0-486-25235-3 (Brochado)
372.850