APA (7th ed.) Citation

(2014). A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte de Santander.

Chicago Style (17th ed.) Citation

A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte De Santander. 2014.

MLA (8th ed.) Citation

A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte De Santander. 2014.

Warning: These citations may not always be 100% accurate.