Project Gutenberg is an organisation whose activity is to "digitally republish fine literature". One of the many texts available for download from their servers is the Oxford Book of English Verse, but, though the book is in the public domain in the US and other countries, the Oxford name is a trademark and so the text is called the Project Gutenberg Book of English Verse.
There are likely to be errors in the mark-up process and it is possible that the poem texts themselves have errors. I have a page describing the mark-up process in more detail, whence also errors can be reported.
If you would like the poems in a form available for download and offline perusal, or a server-side (CGI) script, or other development please e-mail me.