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| 0000015847-15-000028-index.html | 2015-07-29 10:50:06 | |
| 0000015847-15-000028.txt | 2015-07-29 10:50:06 | |
 0000015847-15-000028-xbrl.zip | 156510 | 2015-07-29 10:50:06 |
| buks-20150430.xml | 1331759 | 2015-07-29 10:50:06 |
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| buks-20150430_cal.xml | 72440 | 2015-07-29 10:50:06 |
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| ex99.htm | 36502 | 2015-07-29 10:50:06 |
| FilingSummary.xml | 24325 | 2015-07-29 10:50:06 |
| Financial_Report.xlsx | 64235 | 2015-07-29 10:50:06 |
| form10k.htm | 1633585 | 2015-07-29 10:50:06 |
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| report.css | 2767 | 2015-07-29 10:50:06 |
| Show.js | 1410 | 2015-07-29 10:50:06 |