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	1.	No cover image available Studies on the humic, acid Lake Gribso / by Kaj Berg and Ib Clemens Petersen. With contributions by Kaj Hansen, Per Wolthers, and Gunnar Nygaard. Translation by Annie I. Fausboll. by Berg, Kaj, 1899- Petersen, Ib Clemens Publication details: Copenhagen : Munksgaard, 1956 Availability: Items available for loan: PERPUSTAKAAN TUN SERI LANANG (1)Call number: QH98 .B4. Place hold
	2.	No cover image available Studies on the plankton in the lake of Frederiksborg castle / by Kaj Berg and Gunnar Nygaard. by Berg, Kaj, 1899- Nygaard, Gunnar Publication details: Kobenhavn : A. F. Host and Son, 1929 Availability: Items available for loan: PERPUSTAKAAN TUN SERI LANANG (1)Call number: QL143 .B3. Place hold

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