| ID | 035546 |
| Call Number | 032/PRO |
| Title Proper | Great Soviet encyclopedia Vol.21 |
| Language | ENG |
| Author | Prokhorov A.M. editor |
| Edition Statement | 3rd edn. |
| Publication | New York, MacmillanInc., 1978. |
| Description | xxiii,750p. |
| Classification Number | 032 |
| Key Words | Encyclopedias and dictionaries ; Reference books ; Knowledge,books of |