00541nam a2200133Ia 4500008004100000082002900041100003400070245008600104260007700190300001300267600003100280600001900311650007700330130903s9999    xx            000 0 und d  aTR311.211:632.7(02)   M1  a Daroga Singh and R.K.Khosla.  aMonograph on estimation of incidence of crop pests and diseases and yield losses.  aNew DelhibIndian Agricultural Statistics Research Institute, ICARc1981  aii,130p.  aKhosla, R.K., joint author  aSingh, Daroga.  aField crops-diseases and pests,Crop yield-estimation-mathematical models