APA aipamena

Wienert, K. A. (1970). Notes on geomagnetic observatory and survey practice. Unesco.

Chicago Style aipamena

Wienert, K. A. Notes on Geomagnetic Observatory and Survey Practice. [Paris]: Unesco, 1970.

MLA aipamena

Wienert, K. A. Notes on Geomagnetic Observatory and Survey Practice. Unesco, 1970.