URL: www.nas.org/aca ... https://www.nas.org/academic-questions/34/3
URL: www.catchword.c ... http://www.catchword.com/rpsv/cw/tranpub/08954852/contp1.htm
URL: firstsearch.ocl ... http://firstsearch.oclc.org
URL: firstsearch.ocl ... http://firstsearch.oclc.org/journal=0895-4852;screen=info;ECOIP
URL: www.springerlin ... http://www.springerlink.com
URL: www.nas.org/aca ... https://www.nas.org/academic-questions/34/3
URL: www.catchword.c ... http://www.catchword.com/rpsv/cw/tranpub/08954852/contp1.htm
URL: firstsearch.ocl ... http://firstsearch.oclc.org
URL: firstsearch.ocl ... http://firstsearch.oclc.org/journal=0895-4852;screen=info;ECOIP
URL: www.springerlin ... http://www.springerlink.com
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%220895-4852%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%220895-4852%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%220895-4852%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+0895-4852
