Digital versions of Nenițescu's treatises can often be found on academic sharing platforms:

In the world of chemical sciences in Eastern Europe, Prof. Costin D. Nenitescu is not just a textbook author; he is a legend. His magnum opus, "Chimie Generală" (General Chemistry), is widely regarded as the most rigorous, clear, and comprehensive chemistry textbook ever written in the Romanian language. Yet, for the modern student, finding a digital copy is akin to a treasure hunt.

in its later editions (such as the widely used 1979 and 1985 versions), provides an exhaustive introduction to inorganic and physical chemistry. It is celebrated for its encyclopedic depth

For decades, this book has been the primary source for university entrance exams (Admitere Medicină). If you can master Nenițescu, you can master anything. Clear Logic:

If you have the file, you are not just a student; you are a custodian of Romanian scientific heritage. If you don’t have it, keep searching. Ask your older lab assistant. Go to the faculty archive. The book is out there.