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| FUNDS | SUMMARY PROSPECTUS | STATUTORY PROSPECTUS | STATEMENT OF ADDITIONAL INFORMATION | ANNUAL REPORT | SEMI-ANNUAL REPORT | FACT SHEET | XBRL |
| Energy Fund |  | | | | | |  |
| Income & Opportunity Fund | | | | | | | |
| Income Fund | | | | | | | |
| Large Cap Value Fund | | | | | | | |
| Municipal Tax Free Bond Fund | | | | | | | |
| Real Estate Income and Growth Fund | | | | | | | |