ej sceery made a good how to cassette tape many years ago about coyotes.i'm not sure where you can get this tape by its self,that is with out buying it in a kit of some sort.a good video on the subject is put out by primos and its called truth about coyotes volume 1.alot of kills but alot of instruction also.randy anderson puts out one to,i have never seen this one but i'm sure its a good one.this can be had at www.callingcoyotes.com theres also some real good calls at that site.the rich cronk howler is indeed a nice howler but very pricy,as it should be.i used to use a ej sceery open reed howler but it surrcombed to slober rot and i got tired of the large size.i now use a quakerboy howler that sounds ok but is alot smaller.another real good one is the red desert howler and if i remember correctly can be found also at that callingcoyotes site.i.m not sure what the stewart pc-1 call is but it sounds like a long range call,you also need a mid range and coaxer call.very important to have the right volume for the right situation.