Probably standard oncidium care would be best for this.
http://www.aos.org/Default.aspx?id=202]Oncidium Care
Burr. stands for Burrageara and it's a cross that involves both oncidiums and miltoniopsis.
I have Nelly Isler (which you will find is quite popular here and may find more information on) which is a cross of Stefan Isler and another Miltoniopsis. I would guess care of yours would be similar and I've based my care on the Oncidium instructions on the link above.
---------- Post added at 07:39 PM ---------- Previous post was at 07:33 PM ----------
By the way, not sure how new you are to the naming of orchids so I'll explain that a bit further.
Burrageara is the genus name.
Stefan Isler is the grex name (or hybrid name). Note that hybrid names are always capitalised while species names are lower case. Theoretically species names should also be italicised but most people miss that out.
'Lava Flow' is the cultivar name. This is a name given to a specific plant and it's clones (or divisions). A seed cross of two of the same cultivar can't use the same cultivar name as they will not be genetically identical.
There is more info here about how orchids are named.
Orchid Naming
---------- Post added at 07:41 PM ---------- Previous post was at 07:39 PM ----------
By the way, I've also found that due to reclassification of some of the parents, this is no longer a Burrageara. It has now been classified as Oncidopsis. However most people will know it as Burrageara and you are more likely to find information on it under that name.