Water resources series.

no.1-5; no.1-3 1950-1951; no.5; no.6 1954; no.7 1955; no.8 1955; no.9 1956; no.10 1956; no.11; no.12; no.13 1958; no.14 1959; no.15 1960; no.16 1960; no.17 1961; no.18 1961; no.19 1962; no.20 1962; no.21 1962; no.22 1962; no.23 1963; no.24 1963; no.25 1963; no.26 1964; no.27 1964; no.28 1964; no.34 1965-1966; no.29 1966; no.33 1966; no.30 1967; no.31 1967; no.32 1967; no.35 1968; no.36 1968; no.37 1968; no.38 1968; no.39 1969; no.40; no.41; no.42; no.43; no.44; no.45; no.46; no.47; no.48; no.49; no.50; no.51