1. The effect of fertilisation on sulphur dioxide damage to conifers in industrial and built-up areas;Bjorkman;Stud. for. suec.,1970
2. The effect of smog on the anatomy of oat leaves;Bobrov;Phytopathology,1952
3. The leaf structure of Poa annua with observations on its smog sensitivity in Los Angeles County;Bobrov;Am. J. Bot.,1955
4. Plant factors influencing the water status of plant tissues;Cowan,1968
5. Determination of total sulphur in plant material;Cunningham;Chemy Ind,1962