May 1969 has the Tomorrowland Jets back. The Sailing Ship Columbia and the Mark Twain are gone from the "D" ticket, having moved UP to the "E" Ticket in 1968. You'll see on the next ticket, they both return to the "D" ticket. Why do you suppose they were moved up to the "E" ticket for just two years?
Notice the price increase, it's now 70 cents, inflation has now hit Disneyland on this May 1970 "D" ticket! The Sailing Ship Columbia and the Mark Twain are back from there brief appearance on the "E" ticket. Also, note the Frontierland Railroad station is now in "New Orleans Square". The Mine Train is gone, back on the "E" for a couple more years, we'll see it again soon on the "D" ticket.
And just because this post needs some color, here is a nice cover to the Summer 1967 Guide book, supplied courtesy of INA.