The Experience of GRD in the teaching of science and technology and productive work/ by Dietrich Blandow; Erwin Messner.
Blandow, Dietrich.
The Experience of GRD in the teaching of science and technology and productive work/ by Dietrich Blandow; Erwin Messner. - Berlin : University College of Education, 1987. - 62 p.; 20 cm. retrs., fot.
371.13: 5:6 (430.2) =201987 BLA.
The Experience of GRD in the teaching of science and technology and productive work/ by Dietrich Blandow; Erwin Messner. - Berlin : University College of Education, 1987. - 62 p.; 20 cm. retrs., fot.
371.13: 5:6 (430.2) =201987 BLA.