Sections 37-101-153 through 37-101-161 shall not alter, modify, change or repeal Sections 37-101-141 through 37-101-151, providing for the sale of timber and leasing for oil, gas and mineral purposes certain lands therein referred to. Sections 37-101-153 through 37-101-161 provide a method for the leasing of lands belonging to the several institutions of higher learning and other institutions under the control and management of said board of trustees not authorized by Sections 37-101-141 through 37-101-151.