Thomson, 58 Alpha Science, 31 Alpa Science, 9 Wadsworth, 8 Narosa, 7 Thompson, 4 Thomson Brooks, 4 Cengage Learning, 3 International Thomson Pub, 3 Thomson Wadsworth, 3 Thomson Wodsworth, 3 Pearson, 2 South-Western, 2 South Western Cengage Learning, 2 South Westrn, 2 South Western, 2 Business Press, 1 Wadswort Thomson, 1 South Western College Publishers, 1 Delmar, 1