INVASIVE WEEDS A THREAT TO THE BIODIVERSITY: A CASE STUDY FROM ABBOTABAD DISTRICT , N W PAKISTAN Khan Bahadar Marwat Marwat SAIMA HASHIM DOI: https://doi.org/10.28941/pjwsr.v8i1%20and%202.75 PDF Published 2002-03-01 Issue Year 2002, Volume 8 , Issue 1 and 2 Section Articles