diff --git a/books/free-programming-books-langs.md b/books/free-programming-books-langs.md
index 245a50e64..1146f273d 100644
--- a/books/free-programming-books-langs.md
+++ b/books/free-programming-books-langs.md
@@ -643,9 +643,11 @@ Books on general-purpose programming that don't focus on a specific language are
 
 ### CUDA
 
-* [CUDA C Best Practices Guide](https://docs.nvidia.com/pdf/CUDA_C_Best_Practices_Guide.pdf) (PDF)
-* [CUDA C Programming Guide](https://docs.nvidia.com/pdf/CUDA_C_Programming_Guide.pdf) (PDF)
-* [OpenCL Programming Guide for CUDA Architecture](http://www.nvidia.com/content/cudazone/download/OpenCL/NVIDIA_OpenCL_ProgrammingGuide.pdf) (PDF)
+* [CUDA C Best Practices Guide](https://web.archive.org/web/20170517050133/https://docs.nvidia.com/pdf/CUDA_C_Best_Practices_Guide.pdf) - Nvidia (PDF) *(:card_file_box: archived)*
+* [CUDA C Programming Guide](https://web.archive.org/web/20181228130113/https://docs.nvidia.com/cuda/pdf/CUDA_C_Programming_Guide.pdf) - Nvidia (PDF) *(:card_file_box: archived)*
+* [CUDA C++ Best Practices Guide](https://docs.nvidia.com/cuda/pdf/CUDA_C_Best_Practices_Guide.pdf) - Nvidia (PDF)
+* [CUDA C++ Programming guide](https://docs.nvidia.com/cuda/pdf/CUDA_C_Programming_Guide.pdf) - Nvidia (PDF)
+* [OpenCL Programming Guide for CUDA Architecture](http://www.nvidia.com/content/cudazone/download/OpenCL/NVIDIA_OpenCL_ProgrammingGuide.pdf) - Nvidia (PDF)
 
 
 ### D