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

Green revolution in India gan Chopra, R.N

Biology of bryophytes gan Chopra , R.N

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

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

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

Awduron Eraill: “...Chopra, R.N...”

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

Awduron Eraill: “...Chopra, R.N...”

Dictionary of library science

Awduron Eraill: “...Chopra , R.N., ed...”

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

Awduron Eraill: “...Chopra, R.N...”

Glossary of Indian medicinal plants gan Chopra, I.C

Awduron Eraill: “...Chopra, R.N...”