Here, I suggest some useful scientific texts and web sites where it is possible to find paramount basics and data on geothermal and hydrocarbon systems

GEOTHERMICS

Nicholson K. (1993) - Geothermal Fluids. Chemistry and Exploration Techniques. Ed. Springer Verlag; pp. 261.
Beardsmore G.R. & Cull J.P. (2001) - Crustal Heat Flow. A Guide to Measurements and Modelling. Ed. Cambridge; pp.324.
DiPippo R. (2015) - Geothermal Power Plants. Principles, Applications, Case Studies and Environmental Impact. Ed. Butterworth-Heinemann; pp.800.
Cataldi R., Mongelli F., Squarci P., Taffi L., Zito G., Calore C. (1995) - Geothermal ranking of Italian territory. Geothermics, 24, 115-129. https://doi.org/10.1016/0375-6505(94)00026-9

IGA - International Geothermal Association - https://www.geothermal-energy.org/
EGEC - European Geothermal Energy Council - https://www.egec.org/
UGI - Unione Geotermica Italiana - https://www.unionegeotermica.it/

HYDROCARBONS

Etiope G. (2015) - Natural Gas Seepage. The Earth’s Hydrocarbon Degassing. Ed. Springer; pp. 193.
Dembicki H. (2017) - Practical Petroleum Geochemistry for Exploration and Production. Ed. Elsevier, pp. 334.

Nicholson K. (1993) - Geothermal Fluids. Chemistry and Exploration Techniques. Ed. Springer Verlag; pp. 261.

Beardsmore G.R. & Cull J.P. (2001) - Crustal Heat Flow. A Guide to Measurements and Modelling. Ed. Cambridge; pp.324.

DiPippo R. (2015) - Geothermal Power Plants. Principles, Applications, Case Studies and Environmental Impact. Ed. Butterworth-Heinemann; pp.800.

Cataldi R., Mongelli F., Squarci P., Taffi L., Zito G., Calore C. (1995) - Geothermal ranking of Italian territory. Geothermics, 24, 115-129. https://doi.org/10.1016/0375-6505(94)00026-9

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IGA - International Geothermal Association - https://www.geothermal-energy.org/

EGEC - European Geothermal Energy Council - https://www.egec.org/

UGI - Unione Geotermica Italiana - https://www.unionegeotermica.it/

HYDROCARBONS

Etiope G. (2015) - Natural Gas Seepage. The Earth’s Hydrocarbon Degassing. Ed. Springer; pp. 193.

Dembicki H. (2017) - Practical Petroleum Geochemistry for Exploration and Production. Ed. Elsevier, pp. 334.