70 & 80 presentations

240728-110140-04330	240728-125854-04332	240728-125856-04333	240728-125854-04331
240728-125856-04334	240728-130214-04336	240728-130208-04335	240728-130214-04337
240728-130214-04338	240728-130216-04339	240728-130226-04341	240728-130226-04340
240728-130228-04342	240728-130228-04343	240728-130228-04344	240728-130228-04345
240728-130228-04346	240728-130322-04347	240728-130324-04348	240728-130326-04350
240728-130324-04349	240728-130414-04352	240728-130326-04351	240728-130414-04354