PUBLIC LAWS-CH. 337-JULY 25, 1947 48 Stat. 401 . 48 Stat. 451. 16U. S. C.§718d. 50 Stat. 917 . Reimbursements. 49 Stat. 1913. Interchange of amounts. Transfer of surplus property. of the herd of long-horned cattle on the Wichita Mountains Wildlife Refuge, $900,000. River basin studies: For investigations and studies to determine the effects on fish and wildlife resources of proposed developments of river basins of the United States (except the Missouri River Basin), and for the preparation of reports thereon in accordance with the Act of March 10, 1934 (16 U. S. C . 661-666), as amended, $200,000. In all, salaries and expenses, $6,492,810. MIGRATORY BIRD CONSERVATION FUND For carrying into effect section 4 of the Act of March 16, 1934, as amended (16 U. S. C . 718-718h), an amount equal to the sum received during the fiscal year 1948 from the proceeds from the sale of stamps, to be warranted monthly and to remain available until expended; and in addition thereto an amount equal to the unobli- gated balance on June 30, 1947, of the total of the proceeds received from the sale of stamps prior to July 1, 1947, also to remain available until expended and to be available for the payment of obligations chargeable against appropriations heretofore made. FEDERAL AID IN WILDLIFE RESTORATION For carrying out the provisions of the Act of September 2, 1937, as amended (16 U. S. C . 669 -669j), an amount equal to the sum credited during the fiscal year 1947 to the special fund created by said Act: Provided, That not exceeding 20 per centum of the amount allocated to any State shall be available for the construction of improvements. Total, Fish and Wildlife Service, $6,492,810, and in addition thereto. funds made available under the Migratory Bird Conservation Fund and the fund for Federal Aid in Wildlife Restoration, of which amounts not to exceed $1,082,700 may be expended for departmental personal services, including such services in the District of Columbia. Funds available for the work of the Fish and Wildlife Service shall be available for the purchase of not to exceed fifty passenger motor vehicles; hire, maintenance, and operation of aircraft; the installation and operation of telephones in Government-owned residences, apart- ments, or quarters occupied by employees of the Fish and Wildlife Service; providing by purchase, construction, or otherwise, facilities incident to such public recreational uses of wildlife refuges as are not inconsistent with the primary purposes of such refuges; newspapers (not to exceed $100) plans and specifications for vessels, or for contract personal services for the preparation thereof without regard to section 3709, Revised Statutes, as amended (41 U. S . C . 5); and rations for officers and crews of vessels; and for the expenditure from appropriations available for the purchase of lands of not to exceed $1 for each option to purchase any tract of land. Reimbursements for the cost of supplies and materials and the transportation and handling thereof issued from central warehouses authorized to be established by the Act of June 24, 1936 (16 U. S. C. 667), may be credited to the appropriation current at the time supplies and materials are allotted, assigned, or issued, or at the time such reim- bursements are received. Not to exceed 5 per centum of the foregoing amounts for expenses of the Fish and Wildlife Service shall be available interchangeably for expenditure on the objects included within the general expenses of said Service, but no more than 5 per centum shal be added to any one item or appropriation. The War 488 [61 STAT.