TY - SER AU - El-Said,Adel Salim TI - A study on mechanical weeds control in canals and drains PY - 1978/// KW - Weeds KW - Control N1 - Thesis (M.S.)--Zagazig University, 1978; Includes bibliographical references (leaves 67-69); Microfiche; ASUNET; Ain Shams University; 2 Microfiches : negative ER -