Stable Management magazine appeared bi-monthly. It was ‘devoted to the administrative, business, supply and equipment interests of those who own and manage riding schools, livery stables and riding stables.’
The earliest one I’ve found was called Riding School and Stable Management – the title changed to Stable Management at some point in the 1960s. Each issue featured a different establishment, and they do make fascinating reading now we look back from the very different climate in which riding schools and stables operate now.
Stable Management no longer appears to be in print in the UK, but there is a magazine of the same name published in the US.
The magazine was available only through subscription.