In this issue
p. 0699

Seventy years of ozone research
p. 0701 | Dutsch, H. U.

Laboratory studies of the photochemistry of ozone
p. 0711 | Way, R. P.

Ozone observations and research in New Zealand -- A historical perspective
p. 0722 | Farkas, E.

Dumping nuclear waste in the molten lava on the flanks of an active volcano and Comments
p. 0728 | Rama; Prasad, A. N.

Is the Mexican beetle Zygogramma bicolarata (Coleoptera: Chrysomelidae) expanding its host range? The beetle battle
p. 0729 | Kumar, A. R. V.

Where too much is not a good thing
p. 0731 | Ramakrishnan, T.

Biological control programmes--time to retrospect
p. 0732 | Shanker, R. Uma; Ganeshaiah, K. N.

Direct numerical simulation of the initial evolution of a turbulent axisymmetric wake
p. 0734 | Basu, A. J.; Narsimha, R.; Sinha, U. N.

Commercial exploitation--A threat to Indian orchids?
p. 0740 | Lokesha, R.; Vasudeva, R.

NMR chemical shielding tensors as a tool for probing molecular environment: Carbon-13 NMR and X-ray studies on malonic acid
p. 0743 | Jagannathan, N. R.; Rajan, S. S.; Subramanian, E.

Nonspecific defence mechanisms of Cirrhinus mrigala against Escherichia coli and Salmonella typhi
p. 0744 | Pal, Debasish; Gupta, Chanchal Das

Late Quaternary turbidites of the Arabian Sea abyssal plain, west of Lakshadweep
p. 0747 | Adiga, K. S.; Kalluraya, V. K. K.

Annual Review of Medicine 1992
p. 0750 | Kartha, C. C.

Annual Review of Plant Physiology and Plant Molecular Biology 1991
p. 0751 | Johri, M. M.

Annual Review of Genetics 1991
p. 0752 | Ramakrishnan, T.

Reliability Analysis and Prediction: (A Methodology Oriented Treatment)
p. 0753 | Dummer, G. W. A.

Biotechnology in Crop Improvement
p. 0754 | Chopra, V. L.; Sharma, R. P.