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<BIB>Falco (2012)</BIB> today Louise is hardly isolated. More than 5 m
+illion babies have been born using the procedure, which has become al
+most routine. And at the age of 28, Louise became a mother herself, g
+iving birth to a baby boy name Cameron—conceived, by the way, in the 
+old-fashioned way (<BIB>Falco, 2012</BIB>; <BIB>ICMRT, 2012</BIB>
Total occurrences of <BIB> is 1

use strict;
use 5.14.2;
...
};
print "Total occurrences of <BIB> is $bib_count";
close $INPUT_REF_FH;