Παραπομπή APA

Spradley, L. H. (1985). Surveying and navigation for geophysical exploration. Boston: International Human Resources Development Corp..

Παραπομπή Chicago Style

Spradley, L. Harold. Surveying and Navigation for Geophysical Exploration. Boston: International Human Resources Development Corp., 1985.

Παραπομπή MLA

Spradley, L. Harold. Surveying and Navigation for Geophysical Exploration. Boston: International Human Resources Development Corp., 1985.

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