Долженкова И. В - Article · April 020 citations reads 45 authors: Some of the authors of this publication are also working on these related projects Долженко Г. «Экскурсионное дело». Уч.пос. М.: 2006 - Samarqand iqtisodiyot va servis instituti ekskursiya xizmatini tashkil qilish