Landwirtschaftliches Zentralblatt.

v.1-2 1955-1956; v.3 1957; v.4-5 1958-1959; v.6 1960; v.7 1961; 1962 Classification system; v.8 1962; v.9 pt.1 1963; v.9 pt.2 1963; v.10 no.1-6 1964; v.10 no.7-9 1964; 1965 Classification system; v.11 no.1-6 1965; v.11 no.7-9 1965; v.12 no.1-5 1966; v.12 no.6-9 1966; v.13 no.1-6 1967; v.13 no.7-9 1967; v.14 no.1-6 1968; v.14 no.7-9 1968; v.15 no.1-6 1969; v.15 no.7-9 1969; v.16 no.7-9 1970; v.17 no.1-4 1971; v.17 no.5-9 1971; 1972; v.18 no.1-5 1972; v.18 no.6-9 1972; v.19 no.1-4 1973; v.19 no.5-9 1973; v.20 no.1-4 1974; v.20 no.5-8 1974; v.20 no.9 1974; 1975 no.5,7; 1975 no.9; v.21 no.1-4 1975; v.21 no.5-8 1975; Suppl.; v.10 Author Index 1964; index; 1968 Index; v.15 Author Index 1969; 1975 Index; 1970 Sub. Index; 1974 Index