Seri Olimpiade Fisika Drs. Valentinus Barus text Jakarta PT Lestari Kiranatama 2010 - ii, 62 hlm. : ilus. ; 21 cm. Drs. Valentinus Barus Biografi Ilmuwan 925 925 VAL p 978-602-8982-14-6 20180922033545 INLIS000000000000259 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)