| https://unisoft-cim.com/rotation-modification-options-etc.html
: Link to an older IPC document that reflects IPC-7351 recommendation standards for zero degree orientation of packages in the CAD library "Electronic Component Zero Orientation For CAD Library Construction" : https://ohm.bu.edu/~pbohn
| https://www.eptac.com/wp-content/uploads/2007/11/webinar_eptac_11_14_07.pdf