共 50 条
- [43] RAW-MATERIALS IN TANGANYIKA [J]. TIJDSCHRIFT VOOR ECONOMISCHE EN SOCIALE GEOGRAFIE, 1959, 50 (6-7) : 157 - 160
- [47] VEGETABLE-OILS AS RAW-MATERIALS OF INDUSTRY - A CONTRIBUTION OF AGRICULTURE TO SECURE THE RAW-MATERIALS [J]. FETTE SEIFEN ANSTRICHMITTEL, 1982, 84 (05): : 173 - 178
- [48] RAW-MATERIALS RECYCLING IN THE CROSSFIRE [J]. KUNSTSTOFFE-PLAST EUROPE, 1994, 84 (10): : 1271 - 1271