21 chain and washer pumps :

21 chain and washer pumps : from the 1958 Peking Agricultural exhibition / compiled by Simon Watt. - London : Intermediate Technology Publictions Ltd, 1976. - 49 p. : ill. ; 22 cm.

Open access.

0903031264

77369415


Pumping machinery--Exhibitions.
Agricultural exhibition, Peking, 1958.