TY - BOOK AU - Parminder Kaur AU - Prof.N K Mehra Supervisor AU - University of Delhi. Faculty of Science. Department of Zoology ED - University of Delhi. Faculty of Science. Department of Zoology TI - Spatio-temporal variations in epiphytic communities in relation to water quality of the Delhi segment of River Yamuna and experiments on the patterns of colonisation of epiphyton on natural and artificial substrates PY - 1996/// KW - ZOOLOGY ER -