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Walker John M Ed, Gaastra Wim Ed, . (1987). Techniques in molecular biology. London: Croom Helm.
Walker John M Ed, Gaastra Wim Ed, . 1987. Techniques in molecular biology. London: Croom Helm.
Walker John M Ed, Gaastra Wim Ed, . Techniques in molecular biology. London: Croom Helm. 1987.