# Google shows links to an old version of the lecture notes
**URL:** https://forum.solidstate.quantumtinkerer.tudelft.nl/t/google-shows-links-to-an-old-version-of-the-lecture-notes/1947
**Category:** Site Feedback
**Created:** [May 10, 2022, 3:18pm UTC](https://forum.solidstate.quantumtinkerer.tudelft.nl/t/google-shows-links-to-an-old-version-of-the-lecture-notes/1947 "2022-05-10T15:18:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Maciej](https://forum.solidstate.quantumtinkerer.tudelft.nl/u/Maciej)
#### Post date: [May 10, 2022, 3:18pm UTC](https://forum.solidstate.quantumtinkerer.tudelft.nl/t/google-shows-links-to-an-old-version-of-the-lecture-notes/1947/1 "2022-05-10T15:18:29Z")
@anton-akhmerov : Links to the lecture notes often come in the top of google search results for some solid state physics related concepts 🥳 , but some of them link to what looks like a proto-version of the lecture notes with the link pattern:
`(https://solidstate.quantumtinkerer.tudelft.nl/lecture_#/)`
for example:
[Electrons and phonons in 1D - Open Solid State Notes (tudelft.nl)](https://solidstate.quantumtinkerer.tudelft.nl/lecture_4/)
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### Author:  [@anton-akhmerov](https://forum.solidstate.quantumtinkerer.tudelft.nl/u/anton-akhmerov)
#### Post date: [May 15, 2022, 1:01pm UTC](https://forum.solidstate.quantumtinkerer.tudelft.nl/t/google-shows-links-to-an-old-version-of-the-lecture-notes/1947/2 "2022-05-15T13:01:28Z")
Thanks, should be fixed now (I made old pages redirect to the new ones). Out of curiosity, which queries lead to us?
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### Author:  [@Maciej](https://forum.solidstate.quantumtinkerer.tudelft.nl/u/Maciej)
#### Post date: [May 18, 2022, 7:47am UTC](https://forum.solidstate.quantumtinkerer.tudelft.nl/t/google-shows-links-to-an-old-version-of-the-lecture-notes/1947/3 "2022-05-18T07:47:38Z")
For example:
1. “Drude model” - 3rd result
2. “Sommerfeld model” - 2nd result
3. “Debye model” - 3rd result
4. “Einstein model heat capacity” - 2nd result
and also some content related queries like:
1. “Doping effective mass” - 8th result
2. “1D chain degrees of freedom” - 2nd result
3. “Reciprocal lattice vectors” - 9th result
4. “Effective mass extrinsic semiconductor” - 4th result
It could be though that they are listed near top because of some sort of a personalized search in my browser 🤔 I have not checked it on a different machine / different location.