Risma Siahaan
1 eks tandon
Catatan reproduksi: April dan Oktober: library has: Vol.8:2 (2006); Vol.10:1 (2008); Vol.11:1-2 (2009) ; Vol.12:1-2 (2010) ; Vol.13:1-2 (2011); Vol.15:1-2 (2014); Vol.16:1-2 (2015); Vol.17:1 (2016)
Catatan reproduksi: January, April, July & October. library has: Vol.64: No.1-4 (2010); Vol.65 No.1-4 (2011); Vol.66 No.1-4 (2012); Vol.67 No.1-4 (2013)
1 eks. tandon (2400067B)
library has: Vol.18 No.2 (2000) ; Vol.20 No.1-2 (2002) ; Vol.21 No.1-2 (2003) ; Vol.22 No.2 (2004); Vol.32:1 (2014); Vol.32:2 (2014); Vol.33:1 (2015); Vol.33:2 (2015); Vol.34:1 (2016); Vol.34:2 (2016); Vol.35:1 (2017); Vol.35:2 (2017)