He created an alphabetical author catalog and had also created other cataloging methods that were not implemented .
He was not allowed to make complete changes to the existing closed catalog , but was allowed to improve upon it so he started on that task immediately .
He created an alphabetical author catalog and had also created other cataloging methods that were not implemented .
He was not allowed to make complete changes to the existing closed catalog , but was allowed to improve upon it so he started on that task immediately .