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

Green revolution in India od Chopra, R.N

Biology of bryophytes od Chopra , R.N

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

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

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

Drugi avtorji: “...Chopra, R.N...”

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

Drugi avtorji: “...Chopra, R.N...”

Dictionary of library science

Drugi avtorji: “...Chopra , R.N., ed...”

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

Drugi avtorji: “...Chopra, R.N...”

Glossary of Indian medicinal plants od Chopra, I.C

Drugi avtorji: “...Chopra, R.N...”