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.

Kolejni autorzy: “…Chopra, R.N…”

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

Kolejni autorzy: “…Chopra, R.N…”

Dictionary of library science

Kolejni autorzy: “…Chopra , R.N., ed…”

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

Kolejni autorzy: “…Chopra, R.N…”

Glossary of Indian medicinal plants od Chopra, I.C

Kolejni autorzy: “…Chopra, R.N…”