Helweg, Otto J.
Improving well and pump efficiency Otto J. Helweg, Verne H. Scott, Joseph C. Scalmanini - Denver American Water Works Association 1984 - 158 p. il. n. 23 cm
0898672848
Ingenieria hidraulica
Improving well and pump efficiency Otto J. Helweg, Verne H. Scott, Joseph C. Scalmanini - Denver American Water Works Association 1984 - 158 p. il. n. 23 cm
0898672848
Ingenieria hidraulica

