Bibliografi : hlm. 397-413
No Inv.: 1221/P/Perp/92/1c~833/P/Perp/92/1c
No Inv.: 131646/S/Perp/12/1c
No Inv.: 118724,118726/P/Perp/09/2c~144309/PH/Perp/14/1c
Judul asli : "Mechanical measurements"
No Inv.: 111740-111742/P/Perp/07/3c~127697-127701/P/Perp/10/5c
No Inv.: 102044/P/Perp/05/1c
No Inv.: 39/AF/Perp/90/1c
No Inv.: 100798/P/Perp/05/1c