Our library has done Level 4 holdings for FAMILY ECONOMICS REVIEW as
follows:

1986-1988;
v.1:no.3 (1988)-v.5:no.2 (1992)

Offhand, I am not aware of any good source of examples of complicated
holdings, but feel free to look at our records.
http://wings.buffalo.edu/libraries/e-reources/bison/

I'd be happy to answer specific questions about Level 4 holdings,we've
done a lot of them!  Susan

*****************************************************************************
Susan Davis                           BITNET: UNLSDB@UBVM
Head, Periodicals                   INTERNET: UNLSDB@UBVM.CC.BUFFALO.EDU
Central Technical Services             PHONE: (716) 645-2784
Lockwood Library Bldg.                   FAX: (716) 645-5955
State University of NY at Buffalo
BUFFALO, NY  14260-2200