Whenever the proceeding has been initiated or proposed by either of the methods above provided, the said board shall cause notice to be published of the said proposal, which notice shall be sufficiently full to fairly apprise all persons in interest of the character and objects of said proposal. The notice shall fix a time and place when and where the board of supervisors will hear objections to the creation of said district and to the bringing of any of the defined territory within said district. Said notice shall be published in a newspaper of general circulation published in the county once a week for three weeks prior to the date of the hearing fixed in said notice; the first publication shall be not less than eighteen nor more than forty days prior to said date. If there be no newspaper published in the county in which the territory is located, the notice shall be published in some newspaper having a general circulation therein.