This "Other Publications" option is a submenu to all BSI publications (except the Journal). The submenu is only visible when you login to the website and if access to the member only content is granted to you (send a message to the Webmaster if you are a current member of the BSI with an account on bsi.org). Under Other Publications you will find: Bromeliad Binomial, Key to the Genera of Bromeliaceae, and a 1984 Cultivar List by Brian Smith.
All other "member only content" is only visible in this menu, if access to the member only content is granted to you. You need to create an account and send a message to the Webmaster.