E LEARNING AND THE SCIENCE OF INSTRUCTION
CLARK, R.C. & MAYER, R.E.
E LEARNING AND THE SCIENCE OF INSTRUCTION - USA : PFEIFFER 2003 - 322 p.
0000787960519
E LEARNING : BUSINESS EDUCATION
371.334 / C41
E LEARNING AND THE SCIENCE OF INSTRUCTION - USA : PFEIFFER 2003 - 322 p.
0000787960519
E LEARNING : BUSINESS EDUCATION
371.334 / C41