hello rr i think the link to the railway performance society should be included for a few reasons readers can see what the society is about and whether they think its references and research are worthy furthermore to be frank the rps generally at least wants some publicity for using their sources and data which to be frank i think is fair enough it s not as if they re a business in it to make money if you want to move the link to the reference at the bottom of the page be my guest i think this is a classic case where an inflexible attitude to wikipedia s rules is counter productive as i say on my user page we shouldn t lose sight of why we re actually here on the cecil j allen book it is actually a book which i have in my collection the full title is locomotive practice performance in the th century first published by heffer in on the reference thing my eyes just glaze over when i see that my brain is already full just as i sometimes edit others grammatical errors i m quite happy for others to edit my references if they want incidentally is there a spelling checker on the wikipedia software because the one on my google toolbar doesn t seem to work on wiki editing for some reason