"Numbers of micro-organisms in relation to aggregate size. "; "Pohlman, G. G. (George Gordon), 1902-", "Nottingham, R. J."; "Soil microbiology.", "Soils.", "Soil structure."; "Pohlman, G. G. (George Gordon), 1902-", "Nottingham, R. J."; "1941"; "Journal article reprint from: Iowa State College Journal of Science, v.15:no.4 (1941:July). "; ""; "P16926"; "pec"; "Soil structure.", "Soil microbiology.", "Soils."; "14256"; .