Minyak serpih di Estonia (Indonesian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Minyak serpih di Estonia" in Indonesian language version.

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doi.org

Väli, E.; Valgma, I.; Reinsalu, E. (2008). "Usage of Estonian oil shale" (PDF). Oil Shale. A Scientific-Technical Journal. Estonian Academy Publishers. 25 (2): 101–114. doi:10.3176/oil.2008.2S.02. ISSN 0208-189X. Diakses tanggal 2008-10-25.

kirj.ee

Väli, E.; Valgma, I.; Reinsalu, E. (2008). "Usage of Estonian oil shale" (PDF). Oil Shale. A Scientific-Technical Journal. Estonian Academy Publishers. 25 (2): 101–114. doi:10.3176/oil.2008.2S.02. ISSN 0208-189X. Diakses tanggal 2008-10-25.

wikipedia.org

en.wikipedia.org

IEA (2013), p. 20
Ots (2004), pp. 15–16

worldcat.org

Väli, E.; Valgma, I.; Reinsalu, E. (2008). "Usage of Estonian oil shale" (PDF). Oil Shale. A Scientific-Technical Journal. Estonian Academy Publishers. 25 (2): 101–114. doi:10.3176/oil.2008.2S.02. ISSN 0208-189X. Diakses tanggal 2008-10-25.