In order to add another source to this page, simple respond to the page and mention the source. You can, if you like, simply type in the URL as your response--just click on the Respond button, enter the title of the web page you are connecting to in the Title box, click on the URL radiobutton for the format, and then type the URL into the large text window entitled Enter your response here:.
That is all that is required. Just click the Preview Response button, and then if it looks right, submit it by clicking on the Post your Response button.
If you want to be notified of further changes made to this page, you can subscribe to it. Subscribing makes you a member, with special privileges, and also puts you on a mailing list. Click on the Membership item at the bottom. Members can also edit their posts if they want to make changes later. Also, the more members there are, the more motivated I will be to maintain this new version of the KHG... :-)
If you aren't subscribed, you should probably leave your name and email address, and possibly home page if you have one.
At some point, the URL may be moved from the response list into the body of the article. If that sentence didn't make sense to you, you can safely ignore it.
Thank you for your help!