Indigenous drugs of India : their medical and economic aspects per Chopra, R.N

Green revolution in India per Chopra, R.N

Biology of bryophytes per Chopra , R.N

Indian ephedras : their chemistry and pharmacology per Chopra, R.N

Food policy in India : a survey per Chopra, R.N

Common medicinal plants of Darjeeling and the Sikkim Himalayas per Biswas, K.

Altres autors: “…Chopra, R.N…”

Insecticidal and piscicidal plants of India per Badhwar, R.L

Altres autors: “…Chopra, R.N…”

Dictionary of library science

Altres autors: “…Chopra , R.N., ed…”

Supplement to glossary of Indian medicinal plants per Chopra, I.C

Altres autors: “…Chopra, R.N…”

Glossary of Indian medicinal plants per Chopra, I.C

Altres autors: “…Chopra, R.N…”