/** Add to a collection of TdbAus for this TDB that match the ISBN. */
public boolean getTdbAusByIsbn(String isbn, Collection<TdbAu> matchingTdbAus) {
boolean added = false;
if (isbn != null) {
for (TdbPublisher tdbPublisher : tdbPublisherMap.values()) {
added |= tdbPublisher.getTdbAusByIsbn(matchingTdbAus, isbn);
}
}
return added;
}
