00625cam a22002051 4500 ca 29000462 DLC 20260227111121.0 920808s1929 pau 000 0 eng ca 29000462 (OCoLC)26351096 DLC MoSW DLC premarc Q181 .E6 Elhuff, Lewis, 1880- Library individualistic and group-method of instruction in general science and the natural sciences, by Lewis Elhuff ... Harrisburg, Pa., The author, c1929. 30 p. 23 cm. Science Study and teaching. 16525 16525