TY  - BOOK
ED  - Royal Education Council (REC)
TI  - Environmental science: Class xi 
SN  - 978-99936-0-440-2
PY  - 2016///
CY  - Paro
PB  - Royal Education Council (REC)
UR  - http://library.sce.edu.bt/cgi-bin/koha/opac-retrieve-file.pl?id=7200d3baaea6a36d8eddc41e48767fe3
ER  -