Judul asli : "The enzyme factor"
No. Inv. : 146378-146379/P/Perp/15/2c
Bibliografi : hlm. 249
Bibliografi : hlm. 138-139
No Inv.: 139507-139511/P/Perp/14/5c
Bibliografi : hlm. 173
No Inv.: 100255/P/Perp/05/1c
Bibliografi : hlm. 161
No Inv.: 128828/PSM/Perp/10/1c