1972 Surveys

rtl-wls-1-31-72f

rtl-wls-1-31-72ia

rtl-wls-1-31-72ib

rtl-wls-1-31-72b

rtl-wls-2-14-72f_landecker

rtl-wls-2-14-72in_top

rtl-wls-2-14-72in_bottom

rtl-wls-2-14-72b

rtl-wls-2-28-72f

rtl-wls-2-28-72in1

rtl-wls-2-28-72in2

rtl-wls-2-28-72b