== Zappa-covers designet af Schenkel ==
* ''Lumpy Gravy'' <ref name="lambiek.net"/>
* ''We're Only In It For The Money'' <ref name="lambiek.net" />
* ''Cruising with Ruben &amp;amp; the Jets'' <ref name="lambiek.net" />
* ''Uncle Meat'' <ref name="lambiek.net" />
* ''Hot Rats'' <ref name="lambiek.net" />
* ''Burnt Weeny Sandwich'' <ref name="lambiek.net" />
* ''Fillmore East - June 1971'' <ref name="lambiek.net" />
* ''Just Another Band from L.A.'' <ref name="lambiek.net" />
* ''The Grand Wazoo'' <ref name="lambiek.net" />
* ''One Size Fits All'' <ref name="lambiek.net" />
* ''Tinseltown Rebellion'' <ref name="lambiek.net" />
* ''Does Humor Belong in Music?'' <ref name="lambiek.net" />
* ''The Best Band You Never Heard in Your Life'' (1995 re-issue)<ref name="lambiek.net" />
* ''Playground Psychotics'' <ref name="lambiek.net" />
* ''Ahead of Their Time'' <ref name="lambiek.net" />
* ''Cheap Thrills'' <ref name="lambiek.net" />
* ''Mystery Disc'' <ref name="lambiek.net" />
* ''Son of Cheep Thrills'' <ref name="lambiek.net" />
* ''Trout Mask Replica''
* ''Threesome No. 1'' and ''Threesome No. 2'' (slipcase art)
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