Lynch, J M. Soil biotechnology : microbiological factors in crop productivity / J.M.Lynch. - Great Britain : ELBS , 1988. - x,191p. : ill.,figs.pict. ; 21cm . include index ISBN: 0632022299 Rs. 247.75 Subjects--Index Terms: BIOTECHNOLOGY-SOIL Dewey Class. No.: 631.46 / LYN/S