3.- Technical notes.

Poster.042-The Afridev and Aquadev handpumps - ( WEDC ).

Poster.041-The UPM pump - ( WEDC ).

Poster.040-The Tara handpump - ( WEDC ).

Poster.039-The Volanta handpump - ( WEDC ).

Poster.038-The Vergnet footpump - ( WEDC ).

Poster.037-The water cycle - ( WEDC ).

Poster.036-Pumping principles - ( WEDC ).

Poster.035-The rope and washer pump - ( WEDC ).

Poster.034-The Blair bucket pump - ( WEDC ).

Poster.033-Reducing waste at waterpoints - ( WEDC ).

Poster.032-Direct action handpumps - ( WEDC ).

Poster.031-Types of reciprocrating handpumps - ( WEDC ).

Poster.030-Reciprocrating and rotary handpump actions - ( WEDC ).

Poster.029-Handpump installation - part 3 of 3 - ( WEDC ).

Poster.028-Handpump installation - part 2 of 3 - ( WEDC ).

Poster.027-Handpump installation - part 1 of 3 - ( WEDC ).

Poster.026-Deep trench latrines in emergencies - ( WEDC ).

Poster.025-Shallow trench latrines in emergencies - ( WEDC ).

Poster.024-Open defecation fields in emergencies - ( WEDC ).

Poster.023-A quick way of measuring the turbidity of water - ( WEDC ).

Poster.022-Foot-operated hole covers for pit latrine squatting plates - ( WEDC ).

Poster.021-A guide to sanitation selection - ( WEDC ).

Poster.020-Raised latrines - ( WEDC ).

Poster.019-Elevated latrines - ( WEDC ).

Poster.018-Borehole latrines - ( WEDC ).

Poster.017-Twin-pit ventilated improved pit VIP latrines - ( WEDC ).

Poster.016-Spiral VIP pit latrines - ( WEDC ).

Poster.015-Ventilated improves pit latrines - VIP latrines - ( WEDC ).

Poster.014-Twin-pit latrines-2 - ( WEDC ).

Poster.013-Twin-pit latrines-1 - ( WEDC ).