Special report / Agricultural Extension Service, University of Minnesota.

no.1-15; no.6 (1962); no.6 (1963); no.12 (1963); no.5 (1964); no.6 (1964); no.12 (1964); no.5 (1965); no.6 (1965); no.12 (1965); no.5 (1966); no.12 (1966); no.5 (1967); no.6 (1967); no.16 (1967:Nov.rev.); no.26 (1967:Sept.); no.5 (1968); no.6* (1968); no.12 (1968); no.1 (1969); no.5 (1969); no.6 (1969); no.12 (1969); no.5 (1970); no.6* (1970); no.12 (1970); no.5 (1971); no.6 (1971); no.12 (1971); no.5 (1972); no.6 (1972); no.5 (1973); no.6 (1973); no.12 (1973); no.24 (1973); no.12 (1974); no.5 (1975); no.6 (1975); no.5 (1976); no.6 (1976); no.12 (1976); no.48 (1976 rev.); no.5 (1977); no.6 (1977); no.53 (1977 rev.); no.1 (1978); no.5 (1978); no.6 (1978); no.24 (1978 rev.); v.47:pt.3; v.59 (1980); no.12 (1981); no.12 (1982); v.37(1970); v.42(1973); v.68(1978); v.95(1982); no.16-27; no.71-74; no.79-84; no.86-90; no.92-96; no.98-107