共 50 条
- [1] PRESERVATION OF OPEN SPACE AREAS - DUNHAM,A JOURNAL OF TOWN PLANNING INSTITUTE, 1968, 54 (02): : 89 - 89
- [6] NECESSITY FOR PRIME FARMLAND PRESERVATION IN METROPOLITAN AREAS USA TODAY, 1978, 107 (2400): : 51 - 53
- [10] FARMLAND AND OPEN SPACE PRESERVATION ACT MICHIGAN COOPERATIVE EXTENSION SERVICE EXTENSION BULLETIN, 1978, (NE-79): : 1 - 6