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

Green revolution in India por Chopra, R.N

Biology of bryophytes por Chopra , R.N

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

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

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

Outros autores: “...Chopra, R.N...”

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

Outros autores: “...Chopra, R.N...”

Dictionary of library science

Outros autores: “...Chopra , R.N., ed...”

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

Outros autores: “...Chopra, R.N...”

Glossary of Indian medicinal plants por Chopra, I.C

Outros autores: “...Chopra, R.N...”