APA
Dr.Ravikumar R., .proceedings of the fifth kerala science congress 28-30 January 1993 Kottayam. India, State committe on science Technology and environment: .
Chicago
Dr.Ravikumar R, .proceedings of the fifth kerala science congress 28-30 January 1993 Kottayam. India, State committe on science Technology and environment: .
Harvard
Dr.Ravikumar R., .proceedings of the fifth kerala science congress 28-30 January 1993 Kottayam. India, State committe on science Technology and environment: .
MLA
Dr.Ravikumar R, .India, State committe on science Technology and environment: . .