Template:ISSN link

{{#if:{{{1|}}}|{{#if:{{{2|}}}|{{#if:1|{{{1}}}}}&nbsp;(print)<includeonly>{{#invoke:check isxn|check_issn|1={{{1|}}}|error={{Please check ISSN}}}}</includeonly>{{{br|
}}} {{#if:1|{{{2}}}}}&nbsp;(web)<includeonly>{{#invoke:check isxn|check_issn|1={{{2|}}}|error={{Please check ISSN}}}}</includeonly>|{{#if:1|{{{1}}}}}<includeonly>{{#invoke:check isxn|check_issn|1={{{1|}}}|error={{Please check ISSN}}}}</includeonly>}}}}<noinclude> <!-- * INTERNAL NOTE: *

• This template uses WorldCat, with the benefit that the link format

*

• https://www.worldcat.org/search?fq=x0:jrnl&q=n2:[item ISSN]

*

• is _documented_ (see worldcat.org) and thus unlikely to change.

*

• {{#if:1| {{{1|}}} }} is equivalent to {{trim|{{{1|}}}}}

--> {{Documentation}} <!-- Add categories to the /doc subpage, not here! --> </noinclude>