I did some tests and found out that link

http://forum.world.stSqueak-Dev-f45487.html

does not work.

On Wed, 27 Jun 2018 02:18:03 0000, commits at source.squeak.org
<commits at source.squeak.org> wrote:
> tim Rowledge uploaded a new version of Help-Squeak-Project to project The
> Trunk:
> http://source.squeak.org/trunk/Help-Squeak-Project-tpr.55.mcz
>
> ==================== Summary ====================
>
> Name: Help-Squeak-Project-tpr.55
> Author: tpr
> Time: 26 June 2018, 7:17:48.711223 pm
> UUID: 511355bd-b9fa-4478-8db1-5a518c9bd4b0
> Ancestors: Help-Squeak-Project-tpr.54
>
> Update some URLs for online resources; sites move, stuff disappears.
> Note that Steph's site seems to block some browser accesses to the actual
> books. No idea why.
>
> =============== Diff against Help-Squeak-Project-tpr.54 ===============
>
> Item was changed:
>   ----- Method: SqueakProjectHelp class>>squeakResourcesOnline (in category
> 'pages') -----
>   squeakResourcesOnline
>   	"This method was automatically generated. Edit it using:"
>   	"SqueakProjectHelp edit: #squeakResourcesOnline"
>   	^HelpTopic
>   		title: 'Squeak Resources Online'
> + 		contents:
> + 'Squeak web sites
> - 		icon: (HelpIcons iconNamed: #squeakIcon)
> - 		contents: 'Squeak web sites
>   	Main Squeak site						http://www.squeak.org
>   	Weekly Squeak							http://news.squeak.org
> + 	Downloads for many versions			http://squeak.org/downloads
> - 	Oversight Board						http://board.squeak.org
> - 	Downloads for many versions			http://ftp.squeak.org
> - 	Development of the virtual machine	http://squeakvm.org
>   	Google+ Page
> + 		https://plus.google.com/communities/111117917267462353507
> - 		https://plus.google.com/u/0/b/115950529692424242526/
>   	
>   Squeak-dev - The main Squeak mailing list
> + 	Join the mailing list to take part in the community. Subscribe to the
> mail server or read on a forum.
>   	http://lists.squeakfoundation.org/mailman/listinfo/squeak-dev
>   	http://dir.gmane.org/gmane.comp.lang.smalltalk.squeak.general
> + 	http://forum.world.stSqueak-Dev-f45487.html
> - 	http://n4.nabble.com/Squeak-Dev-f45488.html
>
>   Squeak-Beginners - The place to ask even the most basic questions
>   	http://lists.squeakfoundation.org/mailman/listinfo/beginners
>   	http://dir.gmane.org/gmane.comp.lang.smalltalk.squeak.beginners
> + 	http://forum.world.st/Squeak-Beginners-f107673.html
> - 	http://n4.nabble.com/Squeak-Beginners-f107673.html
>
>   Squeak By Example
>   	http://www.squeakbyexample.org/
>
> + Many Books about Squeak and Smalltalk in general
> - Squeak, Open Personal Computing and Multimedia
> - 	http://coweb.cc.gatech.edu/squeakbook/
> - 	http://stephane.ducasse.free.fr/FreeBooks/CollectiveNBlueBook/
> -
> - Squeak, Open Personal Computing for Multimedia
> - 	http://www.cc.gatech.edu/~mark.guzdial/drafts/
> - 	http://stephane.ducasse.free.fr/FreeBooks/GuzdialBookDrafts/
> -
> - More Books about Squeak and Smalltalk
>   	http://stephane.ducasse.free.fr/FreeBooks.html
>   !!
> + ]style[(16 225 41 276 65 182 17 35 48 49)bu,,bu,,bu,,bu,,bu,!!' readStream
> nextChunkText!
> - ]style[(16 316 41 173 65 181 17 35 46 106 46 112 37
> 49)bu,,bu,,bu,,bu,,bu,,bu,,bu,!!' readStream nextChunkText!
>
>
>