Look, here is an example of how to do it, I tested it myself on my dracula blog:

this is the page about the [URL="http://dracula-transylvania.blogspot.com/2007/06/blacksmiths-tower-sighisoara.html"]blacksmiths' tower in Sighisoara[/URL]


and this is the link to[URL="http://dracula-transylvania.blogspot.com/2007/06/blacksmiths-tower-sighisoara.html#sighisoara"] a specific paragraph in the sighisoara page[/URL]
The link looks like this: [url]http://dracula-transylvania.blogspot.com/2007/06/blacksmiths-tower-sighisoara.html#sighisoara[/url]