Gaya APA
dhadar, J., Budijarto, . (1971).
Final Report On Gravity Survay In Lagan Area - Djambi And Indragiri Hilir Area-Riau Eastern Part Sumatra Inndonesia .
Bandung:
Pusat Sumber Daya Geologi.
Gaya MLA
dhadar, J.rainir., Budijarto, .
"Final Report On Gravity Survay In Lagan Area - Djambi And Indragiri Hilir Area-Riau Eastern Part Sumatra Inndonesia".
Bandung:
Pusat Sumber Daya Geologi,
1971.
Bukan Logam.