Transforming the .bib file to get upper cases
of course, this isn't an answer to "how do i modify my .bib file"...
make a "myplain.bst" that is a copy of plain.bst, but replaces
FUNCTION {format.title}
{ title empty$
{ "" }
{ title "t" change.case$ }
if$
}
by
FUNCTION {format.title}
{ title empty$
{ "" }
{ title }
if$
}
and then change your document to use myplain.bst instead of plain.bst
do not, under any circumstances, change your plain.bst file! ... changing a fundamental part of the distribution will lead to tears, later.