Awdur
- Forest Industries Training 14 canlyniadau
- WorkSafe New Zealand (Government agency) 2 canlyniadau
- Berger, Dorothy R. 1 canlyniadau
- Berger, Lance A. 1 canlyniadau
- Crawley, Frank 1 canlyniadau
- Institution of Chemical Engineers (Great Britain) 1 canlyniadau
- Preston, Malcolm 1 canlyniadau
- Roberts, Albert R. 1 canlyniadau
- Tyler, Brian, 1935- 1 canlyniadau
- Yeager, Kenneth 1 canlyniadau