Judul asli :" Engineers at Work Salvage at Sea"
Judul asli : Prestressed concrete, third edition
No Inv.: 116581/SM/Perp/09/1c~140646/SM/Perp/14/1c
Bibliografi : hlm. 416 No Inv.: 146982/P/Perp/15/1c
No Inv.: 2437-2441/P/Perp/92/5c~4636-4645/P/Perp/97/10c