- Hydraulic turbines and governors Ca 1949 011
- Hydraulic turbines and governors Ca 1949 012
- Hydraulic turbines and governors Ca 1949 013
- Hydraulic turbines and governors Ca 1949 014
- Hydraulic turbines and governors Ca 1949 015 001
- Hydraulic turbines and governors Ca 1949 016
- Hydraulic turbines and governors Ca 1949 017
- Hydraulic turbines and governors Ca 1949 018
- Hydraulic turbines and governors Ca 1949 019
- Hydraulic turbines and governors Ca 1949 020
- Hydrcombine application ca 1968
- Hydro ad
- Hydro ad
- Hydro Ad Utility managers
- HYDRO AD 001