https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=an%3A%2228657%22%20and%20au%3AHaldar%2C%20S.K.&format=rss2 Search results for 'an:"28657" and au:Haldar, S.K.' at Biblioteca - Ingemmet 0 20