No Inv.: 437/PS2PT/Perp/95/1c
A Keesing`s reference publication
No Inv.: 118312/USIS/Perp/09/1c
No Inv.: 115804/P/Perp/09/1c
No Inv.: 129800/SM/Perp/11/1c
Bibliografi : hlm. 219-223No Inv.: 141146/PSM/Perp/14/1c~144236/Sm/Perp/14/1c~144423/SM/Perp/14/1c
Bibliografi : hlm. 326-347