This book is titled '236 Puntos' (Stitches) . I wonder what the 236 means? It coast 50 pesetas and was published in Barcelona. It includes illustrations of borders, smocking, seam finishes and various stitches. There are some very interesting designs in this book and as with most books of this era they assume that you know what stitches to use in the design.
There were a couple of examples of Lagartera embroidery designs. I bought a copy of a book back in the 1970's which I still have of this kind of embroidery.

And there was a recent publication by the South Australian Embroiderers Guild.

There have been a number of articles in magazines but all in all there is not a lot about this kind of embroidery in English. These are scans of the designs from the vintage book from Spain.



Only the centre image seems to be the type of stitching that is classified as Lagartera Embroidery. The top image says border in polychrome and the bottom one is an antique pattern from the region. Still it is interesting to find something new on this style of embroidery.
This is an interesting site that shows how it is stitched
And here is another book