diff --git a/m150/README.md b/m150/README.md
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--- a/m150/README.md
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| -10- | 09.11.| Abgabe und Bewertung LB3 |
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+
[Bücher zum E-Commerce](https://tbzedu-my.sharepoint.com/:f:/g/personal/harald_mueller_tbz_ch/ErB2x1XS5oxAgyVXZ5888x8BrMg0p8lj0Bx0zxmiDO3nkQ?e=RK7iWb)
-[![Grundlagen-des-E-Commerce](buecher/Deges_Grundlagen-des-E-Commerce.jpg)](buecher/Deges_Grundlagen-des-E-Commerce.pdf)
-[![neue-Online-Handel](buecher/Heinemann_Der-neue-Online-Handel.jpg)](buecher/Heinemann_Der-neue-Online-Handel.pdf)
-[![Schluesselfaktoren-im-E-Commerce](buecher/Grosse-Holtforth_Schluesselfaktoren-im-E-Commerce.jpg)](buecher/Grosse-Holtforth_Schluesselfaktoren-im-E-Commerce.pdf)
+(nur mit Microsoft-TBZ-Account)
+
+[![Deges_Grundlagen-des-E-Commerce](buecher/Deges_Grundlagen-des-E-Commerce.jpg)](https://tbzedu-my.sharepoint.com/:b:/g/personal/harald_mueller_tbz_ch/EfkoF5d8VCtNpXTGFrlLOQgBbhptKszKS9r62jD-ylIzoA?e=T4qHrI)
+[![Heinemann_Der-neue-Online-Handel](buecher/Heinemann_Der-neue-Online-Handel.jpg)](https://tbzedu-my.sharepoint.com/:b:/g/personal/harald_mueller_tbz_ch/ESnBmyHDIGxEj3_N7smbpIgBSUkgy9LRSKN4pJRSxZZY9g?e=weJKGh)
+[![Schluesselfaktoren-im-E-Commerce](buecher/Grosse-Holtforth_Schluesselfaktoren-im-E-Commerce.jpg)](https://tbzedu-my.sharepoint.com/:b:/g/personal/harald_mueller_tbz_ch/EVLGOZSAAohBkLQmKgJdfx4BrV82S7tJ1bJEEKCkBshfsw?e=k0tghC)
diff --git a/m150/buecher/Deges_Grundlagen-des-E-Commerce.pdf b/m150/buecher/Deges_Grundlagen-des-E-Commerce.pdf
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