status and directions Agarwal, A L Kanda, Arun (Eds.) Vrat, Prem text xx New Delhi Phoenix 2002 9999 monographic und xiv,761p. Arun Kanda, Prem Vrat, A L Agarwal and S G Deshmukh Papers presented at the National Conference on Transportation Systems(NCTS)held at Indian Institute of Technology, NewDelhi Transportation Systems 385 K16T 81-7484-058-3 NITIL 190329