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	1.	Notes on geomagnetic observatory and survey practice K. A. Wienert by Wienert, K. A Material type: Text; Format: print ; Literary form: Not fiction Publication details: Paris Unesco 1970 Availability: Items available for loan: Mumbai (1)Call number: 550.380.2+550.389/WIE. Place hold
	2.	Notes on geomagnetic observatory and survey practice K. A. Wienert by Wienert, K. A Material type: Text; Format: print ; Literary form: Not fiction Publication details: Paris Unesco 1970 Availability: Items available for loan: Mumbai (1)Call number: 550.380.2+550.389/WIE. Place hold

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