Quantum Theory
... that in the 1993 textbook Quantum Theory, "uncertainty principle" appears only once in the index, and its entry points back to itself?
... that in the 1993 textbook <i id="mwByw"><b id="mwBy0"><a href="./Quantum_Theory:_Concepts_and_Methods" id="mwBy4" rel="mw:WikiLink" title="Quantum Theory: Concepts and Methods">Quantum Theory</a></b></i>, "<a href="./Uncertainty_principle" id="mwBy8" rel="mw:WikiLink" title="Uncertainty principle">uncertainty principle</a>" appears only once in the index, and its entry points back to itself?