Central flow control software design document.

Final report, January 1979.

Rivers and canals; the flow, control, and improvement of rivers and the design, construction, and development of canals both for navigation and irrigation, with statistics of the traffic on inland waterways;

Paged continuously.

Achieving irrigation return flow quality control through improved legal systems /

Mode of access: Internet.

Pest control materials, 1950: fungicides, herbicides, insecticides, rodenticides, companies, uses and active ingredients

Mode of access: Internet.