text xx New Delhi Tata M C Graw-Hill Co 1973 9999 monographic und ENG XVII, 490P Applied PhysicsTransistors And ThyristorsENVIRONMENT OF THE ROOTS AND THEIR FUNCTIONS, VARIATION IN THE SOIL ENVIRONMENT AND THE REACTIONS OF THE ROOTS, ENVIRONMENT OF THE SHOOT AND ITS FUNCTIONS, LIGHT, ENVIRONMENT OF THE SHOOT AND ITS FUNCTIONS, TEMPERATURE AND WATER, BIOTIC FACTORS IN THE ENVIRONMENT, AGGRESSION, SHADE CAST VEGETATION REPRODUCTION AND SPREAD, PLANT COMMUNITIES, PRODUCTION ECOLOGY , NATURE OF PLANT COMMUNITIES 621.381 528 WIL-P 210323